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Old 3rd Nov 2012, 6:09 am   #21
GP49000
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Default Re: Garrard record player deck identification.

After a couple of years the Autoslim/P and AT6 models were updated with Mk II versions. In the USA the only changes were in the platter mats and colour. In the later AT6 Mk II units produced for sale in the UK and reportedly Australia, some technical advances from the later AT60 model were incorporated, including the DelrinŽ low-friction insert for the automatic trip slider.

Autoslim/P Mk II
AT6 Mk II
AT6 Mk IIa
Autoslim/P Mk II badge
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Last edited by GP49000; 3rd Nov 2012 at 6:33 am.
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Old 3rd Nov 2012, 6:32 am   #22
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Default Re: Garrard record player deck identification.

There was an AT5, too. It was essentially a large-platter version of the Autoslim, most retaining its one-piece, spring-counterbalanced tonearm; some had a plug-in head, and were designated as "AT5P." As many were made as custom units for radiogram and phonograph manufacturers, details such as mats and colours vary and the AT5 may not even have an "AT5" nameplate on it, just one that says it is "custom made by Garrard." The AT5.LM (for "low mass") was better known as the Model 3000.

AT5 brochure
AT5P brochure
AT5P with trim-ring mat
AT5
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Old 3rd Nov 2012, 6:47 am   #23
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Model 50

In 1964, four years after the introduction of the Autoslim line, a new series of upgraded Autoslim-chassis models for the hi-fi market was announced, along with the flagship Lab 80. The lowest priced was the Model 50, a development from the Autoslim with a large platter and a counterweighted tonearm, "the first time such an arm has been available on a low-priced unit." This arm was only partly counterbalanced, still requiring a spring pulling upward on the front of the tonearm to offset the dead weight of the arm's shaft, the headshell and cartridge. The counterweight did permit a lower-tension spring to be used, which made the tracking force adjustment more stable.

Model 50 had a new cut-away headshell and a low-friction DelrinŽ insert for its automatic trip slide, reducing the force required to trip the auto mechanism.

Model 50 as sold in the UK had a two-pole motor and a plain rubber mat on the platter. In the USA, Model 50 had a four-pole motor and the mat from the AT6 Mk II, with a brushed chrome trim disc in the centre.

Two years later in the USA, Model 50 was renamed 40 Mk II when the "50" designation was re-used for the 50 Mk II, a more deluxe version with cueing device.

Model 50
40 Mk II
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Old 3rd Nov 2012, 6:53 am   #24
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Default Re: Garrard record player deck identification.

Here's the 60 Mark 2 (originally with a Sonotone 21T); the 1000 with a Ronette 105 in a Kingsley radiogram; and the 82, a fairly cheap deck with the same mod look as the Zero 100.
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Old 3rd Nov 2012, 6:56 am   #25
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The AT60, as its name suggests, is an upgrade on the AT6. Its large outer platter was heavier, cast of nonferrous alloy and machined. The tonearm was the same as that on the AT6, fully counterweight-adjusted and dynamically balanced, with the addition of an antiskating compensator operated by a pivoting weight bearing upon a rod projecting from the tonearm housing. Its auto trip mechanism was improved with a low-friction DelrinŽ insert for the auto trip slide. It had a new platter mat with a small trim ring. The AT60 also had a revised headshell, cut-away in profile and identified as "M7." It was regarded as a "best buy" in the mid-level hi-fi range, and was a very popular seller. Later in the UK, there was an AT60 Mk II.

AT60
AT60 control panel
AT60 Mk II (UK)
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Old 3rd Nov 2012, 7:10 am   #26
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The Models 1000, 2000 and 3000 were not sold at retail in the USA, where sales representatives British Industries Corporation preferred to be in the hi-fi market, not selling "ordinary record changers." These models had two-pole motors (the hi-fi models on the Autoslim chassis had four-pole motors, which vibrated less and at a lower frequency) and were primarily designed for use with ceramic cartridges, which do not pick up magnetic hum from motors and wiring. The 1000 had a small platter and a one-piece cast aluminum tonearm; the 2000 had a large platter with the same tonearm; and the 3000 had a special tubular tonearm of particularly low mass.

The 3000 was seen in the USA market, built into high-quality radiograms and phonographs from hi-fi manufacturers such as KLH, Scott, and Harman-Kardon, with dedicated Pickering magnetic cartridges and four-pole motors.

Mats, colours and trim could vary, especially on units supplied to radiogram and phonograph makers.

Model 1000
Model 2000
Model 3000, from its distinctive colours this was removed from a KLH phonograph, and transplanted into a plinth.
Model 3000 with trim-ring mat and custom operating control panel.
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Old 4th Nov 2012, 8:27 am   #27
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50 Mk II and 60 Mk II were respectively a brand-new model, and an upgrade of the AT60. The cueing control, first introduced to automatic changers on the Lab 80, proved to be an extremely popular feature, much in demand. Garrard responded by putting it onto lower-priced models. The 50 Mk II was marketed in the same basic price niche as the Model 50. It featured the new cueing control, activated by a lever directly linked to the arm lift mechanism. Thus it was not damped, and the arm lowered exactly as the user lowered the lever. The cast aluminium tonearm of the Model 50 was replaced by a tonearm retaining the same removable headshell but based upon an aluminium tube mounted in a moulded plastic pivot housing. On the rear was a counterbalance weight which partially offset the dead weight of the front of the arm, just as did the counterweight of the Model 50. The new arm had a built-in tracking weight gauge calibrated in grams but requiring a separate gauge for initial setting. Once the initial setting was made, moving a plastic slide on the armtube one increment would adjust the tracking weight by one gram. The 50 Mk II had a unique grey trim ring on its platter mat and a matching grey trim plate on its headshell, though any other M7-type headshell could be substituted by the end user. A new medallion on the left front corner of the chassis identified its model designation.

With the introduction of the 50 Mk II, the Model 50, which remained in the line in America, was renamed 40 Mk II.

The 60 Mk II was the AT60 with the same cueing device as was fitted to the 50 Mk II, and an advanced tracking weight setting dial for its fully counterweight-adjusted, dynamically balanced tonearm. In a minor styling change, it gained a larger brushed metal trim ring than the AT60's, and a round model number medallion like that on the 50 Mk II.
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Old 5th Nov 2012, 4:43 am   #28
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Default Re: Garrard record player deck identification.

SL55, SL65: Autoslim meets the Synchro-Lab motor.

The next step in the evolution of the Autoslim chassis was the introduction of the Synchro-Lab motor. Prior Garrards had used induction motors which could vary in speed under different conditions, while good engineering could minimize these effects. Such factors as line voltage and varying amounts of bearing friction caused by "running cold" or "running hot" could alter the running speed. Typically Garrard assumed a variance of 2% under "normal" operating conditions as being normal.

In 1968 the induction/synchronous motor, named "Synchro-Lab" by Garrard, was introduced. Its speed was determined by the frequency of the alternating current supply. Conventional hysteresis-synchronous were higher in vibration, particularly if made large enough to rapidly accelerate a record player platter from rest to playing speed. The induction/synchronous design got the platter up to speed quickly, like the induction motors heretofore used. A second section of the motor's armature took over as the motor approached top speed, and locked to the frequency of the line current. This new type of motor was just as low in vibration as the induction motor. These characteristics made it ideal for use in record playing equipment and it was a patented Garrard innovation, exclusive for two years before being licensed to other manufacturers who wished to use it.

Garrard did not limit the new motor only to its highest priced machines but also installed it in two low/midpriced Autoslim chassis models, the SL55 and SL65. Respectively these were the 50 Mk II and 60 Mk II, unchanged except for the new motor and nameplates. The SL65 was the ultimate Autoslim-chassis model, with a fully counterweight-adjusted, dynamically balanced tonearm; weighted, nonmagnetic, machined platter; cueing device; the capability to intermix different size records automatically; and the Synchro-Lab motor.

SL55
SL65
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Old 5th Nov 2012, 5:49 am   #29
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The SP25 Single-Play model.

Successful and justly famous among Garrards is the SP25 series. This is remarkable, considering that until very late, they were not sold in Garrards's largest market, the USA.

The SP25 was introduced in 1964 and was built on the compact, popular Autoslim chassis. It was essentially an AT60 record changer without the multiple-play, record-changing mechanism. It also incorporated a built-in arm lift/lower provision which replaced the REJECT function on the control panel. Its large, nonmetallic, cast and machined platter were identical to that of the AT60, as was its fully counterweight-adjusted, dynamically balanced tonearm with built-in, calibrated tracking weight adjuster requiring no external gauge.

The SP25 was also built in custom versions for use in quality radiograms. Of special interest are two versions built for Decca: the Deccadec, which had a special tonearm for fitment of the Decca Deram high-quality ceramic cartridge; and the FFSS Deccadec, with an adapter for fitting Decca FFSS pickup heads, and a special platter completely made of nonferrous metal...the inner drive platter of all other Autoslim models was of steel, and Decca wanted to avoid any interaction with the strong external magnetic field of the FFSS pickup.

SP25 in custom plinth
SP25 overhead view
Deccadec
Deccadec tonearm detail
FFSS Deccadec with Decca head
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Old 5th Nov 2012, 6:01 am   #30
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The SP25 Mk II was introduced simultaneously with the update of the AT60 to the 60 Mk II. Its only major change was the tonearm of the 60 Mk II, with a dial-type stylus pressure adjuster instead of the pointer-on-a-scale type of the SP25 and AT60. There were minor trim differences and larger control handles.

The SP25 Mk III tonearm base housing had a more streamlined profile than that of the former SP25 models and it had the tonearm of the SL65B. The bayonet-mount headshell was replaced with the slide-in cartridge carrier, type C2 and the counterweight was more squared-off in shape. The usual minor trim changes accompanied the other changes.

SP25 Mk II
SP25 Mk II operator's control panel
SP25 Mk III
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Old 5th Nov 2012, 6:17 am   #31
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Default Re: Garrard record player deck identification.

SP25 Mk IV differed at first from the Mk III only in trim. As the supply of Mk III tonearms dwindled, a new headshell design, rectangular in shape with a waffle pattern on top, was introduced. It still accepted the same C2 cartridge clip and was functionally identical. The arm was not calibrated for antiskating or stylus force below two grams, which was the practical lower limit for the Autoslim chassis. The SP25 Mk IV was the last in the SP25 line to have idler-wheel drive, and the last to operate at 78rpm.

SP25 Mk V had belt drive, using the same parts as the former higher-priced 125SB. It was the first SP25 to operate at only two speeds, 33 and 45. It also had a new, S-shaped tonearm that shared the C5 cartridge clip with other models such as the 125SB, the 990B record changer and the DD75 direct-drive turntable. Its counterweight no longer had a locking screw as did those on earlier SP25s, but was on a rubber mounting that slid along the rear tonearm shaft for adjustment, being retained by friction. It retained the same dial-type stylus force adjuster as had been used since the SP25 Mk II and 60 Mk II.

SP25 Mk IV, early version.
SP25 Mk IV tonearm, early version
SP25 Mk IV, late version.
SP25 Mk V, note S-shaped tonearm
SP25 Mk V, tonearm detail showing new counterweight.
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Last edited by GP49000; 5th Nov 2012 at 6:38 am.
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Old 5th Nov 2012, 6:26 am   #32
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Default Re: Garrard record player deck identification.

The SP25 Mk VI differed from the SP25 Mk V only in its trim.

A lower-echelon single-play model, the SP20, was built for use in budget systems, in audio-visual applications such as schools, and for low-priced phonographs. It lacked the arm lift provision of the SP25 and early on, had a two-pole motor instead of the four-pole motor of the SP25. Later production for sale in the USA had the four-pole motor.

The SP20B was an upgrade of the SP20, using the tonearm of the 40B and SL55B record changers. It was contemporary to the SP25 Mk III.

SP25 Mk VI
SP20
SP20B
SP20B tonearm, from USA catalog
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Last edited by GP49000; 5th Nov 2012 at 6:46 am.
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Old 5th Nov 2012, 11:57 am   #33
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Default Re: Garrard record player deck identification.

An absolute mine of information, thank you!

Where does the Disco driver 80 fit into the story? Looks like an 'Sp25 MK VII'!

Being for DJs it lacks the start/auto/record size controls (and probably the cam for weight reasons). Presumably the motor start was via an external switch on the console (FAL, Citronic etc,. used these decks in all-in-one units).
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Old 5th Nov 2012, 4:24 pm   #34
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There were both single and dual disco versions derived from the Autoslim-chassis SP25. Very few of them made it to America, where I am.

The one that I have seen did have the cam. It looked outwardly similar to the SP25 Mk III. A change in the SP25 line which I failed to mention previously: the SP25 Mk III added the lever-operated cueing device of the 40B, SL55B and SL65B. At the same time the LIFT position on the operator's control panel was changed to AUTO, thus permitting the SP25 to automatically play a single record, to repeat a single record, and to REJECT a single record, the arm lifting and returning to its rest and the unit shutting off. My memory of the disco version I saw was that the AUTO position DID reject the record by use of the AUTO function. I do not know whether the modification to disable the auto trip at end of record side was done by Garrard, or performed very neatly by an end user.

It is a shame that I did not take photos of it.

The BSR single-players used in disco setups that I saw, retained all their normal functions including end-of-side auto lift and shutoff.

Among most of the Autoslim series, parts were freely interchangeable. In my own collection I have a 50 Mk II that I upgraded to SL65 standard by substituting its tonearm, Synchro-Lab motor and weighted, cast platter. I once upgraded a 40B with the Synchro-Lab motor, tonearm and antiskate assembly from a damaged SL65B. A more extreme example, shown in the accompanying photo, is an SL65 with the rubber mat and small, steel platter of an Autoslim/P Mk II and the Autoslim's large rectangular operator's control panel (which will not clear the larger platters) and red/white control handles. It apparently began life as an SL65 because its characteristic nameplate, which mounts in punched holes in the chassis, is in the left front, whereas that of the Autoslim/P Mk II was in the left rear corner. It retains the SL65 tonearm and cueing lever.

SL65 with Autoslim platter, control panel and levers
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Old 5th Nov 2012, 4:40 pm   #35
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Default Re: Garrard record player deck identification.

Here is a model 50MkII, rescued from a Hacker Serenade.

This one appears to have a different counterweight and platter (steel) and mat.

Alan
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Old 5th Nov 2012, 4:50 pm   #36
Alan SP15
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Default Re: Garrard record player deck identification.

Don't forget the Model 4HF. now commanding very high prices, especially if fitted to the original metal Garrard base and with the soft cover.

Also available as a chassis, and often found in the Dynatron Mazurka.
Pictured my own, ex Mazurka (already removed before my purchase!), now fitted to a period plinth.

Alan
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Old 5th Nov 2012, 5:35 pm   #37
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Default Re: Garrard record player deck identification.

The 1025, 2025, 2025TC and Model 30

These models replaced the Models 1000 and 2000 in Garrard's lower-priced lineup of Autoslim-chassis units. The 1025 and 2025 had a cast aluminium tonearm with a plastic moulding for mounting the cartridge, instead of the one-piece casting of the 1000 and 2000. The 1025 had a small 7" platter, the 2025 a large 10 1/2" platter.

The 2025TC ("T" for tubular, "C" for cueing) had the 10 1/2" platter and a low-mass tubular tonearm with plastic moulding for the cartridge mount, and a cueing device.

Like all prior Autoslim-chassis models, these could play an intermixed stack of different sized, same-speed records automatically. They were the last models built with this capability.

The standard 1025, 2025 and 2025TC all had two-pole induction motors. The 1025 was also available in a battery-powered version. Colours, mats and trim on all models could vary, as many were supplied in custom versions for radiograms and phonographs.

In the USA, the 2025 was marketed as "Model 30."

1025, in Fleetwood phonograph
2025
2025TC in Hacker GP42 Gondolier
2025TC with custom ceramic cartridge in custom retractable mount, in Packard Bell (USA) console
Model 30, composite from USA catalog pages.
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Old 5th Nov 2012, 6:15 pm   #38
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Default Re: Garrard record player deck identification.

The Autoslim line was a great achievement for Garrard. It was inexpensive to produce, having many fewer parts than its predecessors the RC100/200 series. Key to this was its "single plate" operating mechanism. Whereas the RC100/200, and the RC80/88/Type A line had many levers operating from multiple cams and tracks on a rotating assembly driven by a pinion on the platter, the Autoslim had a simple cam wheel with only one track. Everything was driven from this one track, via a single plate on the underside. Nobody else could use this system; Garrard patented it.

The Autoslim line also was the first Garrard series able to play a stack of same-sized records of randomly mixed sizes. Competing against BSR's inexpensive models in the popular price range and as an OEM supplier for phonograph and radiogram manufacturers, Garrard had to match that capability at the same time minimizing its production costs.

The ability of the Autoslim chassis to meet the needs of medium-priced hi-fi systems helped Garrard expand its reach into those markets with a highly profitable product. Performance capabilities improved, too, particularly in tonearm tracking. At the time of the first Autoslim and AT6 models, it was hardly necessary for a home hi-fi record player to track at under three grams. But lower tracking weights soon became more important. Two aspects of the Autoslim design limited its tracking capabilities: the "friction link" by which the mechanism cycled the arm contributed an amount of drag to the arm's motion, and the automatic trip mechanism added its own friction. The trip mechanism was quickly improved with low-friction DelrinŽ inserts in which the auto trip slider, pushed by the tonearm, would operate. These were incorporated not just in the higher-end Autoslim models such as the AT60 and SP25, but also in all other models, as the change was made to the basic chassis stamping. The "friction link" was gradually improved to the point where, with a change in profile to reduce contact with moving tonearm parts, and a DelrinŽ pad to support it more freely, it hardly limited the tonearm's tracking at all. However, the Autoslim-chassis models never met the claims of Garrard's USA representatives, who claimed in catalogs that the 60 Mk II and SL65 tonearm systems could track and trip flawlessly at 1/2 gram; though the last models such as the SP25 Mk V could get close if optimally serviced and set up.

Through most of its life the Autoslim was idler-driven; but beginning in the late 1970s, the 125SB, 35SB and SP25 Mk V and VI belt-drive models were introduced. The Autoslim design was finally superceded by a mechanism that was even cheaper to build, the "Unimech" which will be discussed later.

Even prior to the acquisition of Garrard by its Brazilian importer Gradiente, assembly of some Garrard models and production of some parts had been moved to Brazil. Brazilian-built models were produced under both Garrard and Gradiente brand names.

Autoslim mechanism patent drawing
RC121D underside mechanism
Type A underside mechanism
AT6 underside mechanism. Note its relative simplicity.
Gradiente-Garrard 50SB, almost identical to SP25 Mk V.
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Last edited by GP49000; 5th Nov 2012 at 6:29 pm.
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Old 5th Nov 2012, 10:07 pm   #39
GP49000
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Default Re: Garrard record player deck identification.

The 1025T, 2025T and 3500

The 1025T and 2025T were updates of the 1025 and 2025. The only significant change was the tonearm. The cast aluminium tonearm of the 1025/2025 was replaced by the tubular tonearm previously introduced on the 2025TC. As the model numbers indicate, the 1025T and 2025T lacked a cueing device.

The 3500 supplemented the 3000 as the "high-performance" record changer with low-mass tubular tonearm. Where the 3000's arm was only partly counterbalanced and still required an upward-pulling spring to offset the weight of the tonearm tube, head and cartridge, the 3500 had a fully counterweighted, dynamically-balanced arm with tracking weight applied by a downward-pulling spring. However, for the first time in the Autoslim line, the 3500 lacked automatic record size selection. Instead of sensing the size of a record as it dropped to the platter, the 3500 required the user to select record size using a unified speed/size selector. The 3500 could play only 12" and 7" records at 33rpm, only 7" records at 45rpm, and only 10" records at 78rpm.

For manual play, the record-stabilizing overarm on the 3500 could be swung to the rear, out of the way for loading records on the platter.

The 3500 also had a cueing device, which the 3000 lacked.

The Garrard 3500 with a two-pole motor was found in better grade phonographs and radiograms such as the Bush A749, Sony HP-465 and Motorola SK220.

A version of the 3500 with four-pole induction/synchronous Synchro-Lab motor and integrated Pickering magnetic cartridge, pre-packaged with USA-sourced plinth and cover, was sold in the USA as the Garrard Module SLx.

A hybrid model, a 3500 chassis with two-pole motor, without automatic record size selection, but with the cueing and the cheaper tonearm of the 2025TC, was packaged with preinstalled ceramic cartridge and USA-sourced plinth and cover and sold in the USA as Module X-10.

3500, from Bush phonograph
3500 control panel
Module SLx (USA)
Module SLx (USA)
Module X-10 (USA)
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Last edited by GP49000; 5th Nov 2012 at 10:30 pm.
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Old 5th Nov 2012, 11:37 pm   #40
GP49000
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Join Date: Mar 2012
Location: Sonoma County, California, USA.
Posts: 391
Default Re: Garrard record player deck identification.

Photos of the 1025T and 2025T

Here are photos of these models, discussed in the last installment. The forum has a limit of five photos per post, and those I posted for the 3500 and its USA derivatives used up that quota.

The lower-priced 1025T and 2025T usually appeared with all-black operating control panel bezels, while the more deluxe 2025TC with cueing was adorned with a silver-paneled bezel. Phono and radio manufacturers specifying Garrard could of course get any kind of trim they wanted, including some with rather garish looking platter mats having multiple silver trim rings and a silver centre disc.

1025T
2025T in portable phonograph
2025T, spindle missing
2025TC with multiple trim rings and center disc on platter
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Last edited by GP49000; 5th Nov 2012 at 11:48 pm.
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