Please ID this PYE equipment (Help)

[miltonpickle]

Hello all: Please can anyone can identify this piece of PYE Telecommunications equipment:

Only items on steel plate are SER#294 and Volts 100/240 all others are blank such as CAT No. -TX-RX- and FREQ-TX-RX

It's blue (seems t be Galvanized metal) like stone wash.

Seems to be a power supply it has DC posts on front that put out 26v DC and a very large black heat sink in middle.

Only switch is toggle AC power on and a ON/OFF indicator bulb. Unit is solid state with a 1A fuse also on front.

Its old but mint shape (beautiful) components like a large 10000uf Red capacitor quality English workmanship for sure

[AC/HL]

Hi Milton,
It is indeed a power supply, designed to run Pye (but will power other's of course) Radio Telephones, more info here: https://www.vintage-radio.net/forum/...ad.php?t=73237

[Biggles]

Probably used to power "fixed mobile" equipment. This was a common practice and involved running a desktop mounted mobile transceiver from a 12V PSU sometimes with battery backup which was enabled by a relay which dropped out if the mains supply failed. Some units had battery input terminals for the connection of a dryfit 12V battery, which would be trickle charged from the supply.
Alan.

[AC/HL]

Or in Green as Pye Power Supply: 5820-99-645-0123

[timewave]

It's from the Pye Cambridge era and I seem to recall that it might be a positive earth (chassis) device. Check before you use it with modern day equipment otherwise if the two come together you might see sparks!!

John G4IJD

[G6Tanuki]

If it's putting out 26VDC i suspect the series-pass transistor's gone short-circuit.

As others have said, it's from the Pye AM/FM AM10 Cambridge era and should deliver 12-and-a-bit volts at around 5 Amps if it is healthy.

[miltonpickle]

Well thanks very much for the info.. Yes I found the 26v reading on my multi meter strange indeed but assumed it was an English oddity Example (positive earth) the supply came from a friend who knows I repair electronics. And the only reason I hang onto it is the quality components and workmanship. I have no idea if it's worth anything or should be in a museum either way it's neat. Approximate age of these units? Again thanks folks. Cheers

[n_r_muir]

Hi

These power units date from the early to mid 1960's. The transistors are probably Germanium types.

[Peter.N.]

Yep, we had a Cambridge low band AM system in the '60s and a 5 watt mobile sat on our desk powered by a mains supply similar to the one shown. I still have the later F30 Westminster base station in my loft.

Peter

[Aaamusements]

On the theme of identifying PYE stuff - anyone know what these are please?

[G6Tanuki]

First thing is a dash-mount control-box and handset for an early "PTC" series radiotelephone from the 1950s. [The actual transceiver unit sat in the boot of the car and drained the battery at a prodigious rate]

See http://www.pyetelecomhistory.org/pro...chure-640p.jpg

Second unit looks like a 24-to-12-volt dropper as used to run 12V radios in trucks, buses etc. Thick wires go to the battery and the radio; the thin wires are used to provide remote switching.

Last photo looks like a slightly later transceiver [Vanguard? Reporter?] and control-box.
http://www.pyetelecomhistory.org/pro...c-box-677p.jpg

[Sean Williams]

Last picture is a boot mounted Cambridge and dash mounted control pod

[dodgy-dxer]

The middle 3 photos are of the 24 to 12 volt convertor for the M290 series

Fred

[G6Tanuki]

Originally Posted by Sean Williams

Last picture is a boot mounted Cambridge and dash mounted control pod

Must be for an early Cambridge - the ones I dealt with had the same small oblong box control-unit as the Vanguard-series.

I note in the same pic also a Whitehall head-unit. I rather liked the Whitehall.

[Aaamusements]

Thanks all, sorry I should have pointed out that in the third picture the unit of interest was just sitting on top of a Cambridge boot box and that the two things are not necessarily related.
From the caption it looks like it's a c-box (control box?) for a Ranger unit. Looks slightly different to the one in the picture though.

[Biggles]

The blue control box sitting on the shelf to the right of the phone in the last photo reminds me of a Whitehall type.
Alan.

[Aaamusements]

Yes it is indeed a Whitehall control unit as mentioned earlier.

We also have a different type which seems to be for 2 Whitehall boot boxes - a VHF and UHF unit both running through the same head unit?

[G6Tanuki]

That's a later control-box - designed to work with a Whitehall *and* a UHF Westminster in 'talkthrough' mode so users with low-power UHF walkie-talkies could [Pye PF-series] could use the Whitehall as a cross-band repeater. MetPol used a number of these, as did the Civil Nuclear Constabulary.

[Station X]

Thread reopened at member's request.

[Aaamusements]

Many thanks.

PYE PTC 114 images, as per request: