Dynatron SRX60 chassis - UK Vintage Radio Repair and Restoration Discussion Forum

skelton · 25th Aug 2015, 11:28 am

I wonder if someone can help me. Amongst my masses of 1970's British Hi Fi, I Also have a lovely Dynatron Audio unit fitted with :-
SRX60 chassis.
Philips 22GC037/59 single-player turntable with GP401 Mk2 cartridge.
CD780 Dolby cassette deck.
Plus a beautiful pair of 3 way Semi Transmission Line speakers with an 8" bass 5" midrange and a 25mm dome tweeter - these speakers sound very nice even compared to eg my TDL transmission line speakers.

My question is does anyone have any info on the SRX receiver, i.e. RMS power output etc. and any info on the speakers.
Regards, Bruce Skelton

skelton · 14th Mar 2018, 1:46 pm

Bump.

Boater Sam · 14th Mar 2018, 1:58 pm

You seem to be kicking an empty can here unfortunately Bruce.
It's unusual but it happens. Have you tried some of the more audio devoted forums?
Or try lots of photos, it may jog some old audiophile's grey matter.

Nuvistor · 14th Mar 2018, 2:00 pm

Cannot help with info but there 3 places online selling the service manual for the SRX60.

Andrew2 · 14th Mar 2018, 2:13 pm

There's a short thread here:

https://www.vintage-radio.net/forum/...d.php?t=144496

dalgwcobl · 14th Mar 2018, 8:24 pm

There is another recent thread about an SRX60 system, to which I have responded. I have service data somewhere if you are interested. (I wrote it many years ago!) The amplifier is rated at 30 watts RMs per channel at, I think, 0.1%THD.
The speakers - yours are the mahogany versions, I have the san-domingo rosewood contemporary LS3238CR? and the walnut period versions, but I can't remember the model numbers. I'll dig the service data out.
Without repeating myself too much, the drive units in the speakers are made by Danish company Peerless. We thought, at the time, that these were the best speakers we'd made. They are bass reflex enclosures and rated at 50 watts DIN.

dalgwcobl · 14th Mar 2018, 8:25 pm

Sorry - just realised that is the thread referred to by Andrew2!

skelton · 4th Apr 2018, 1:51 pm

Ok thanks. Any info you have would be interesting.

Regards, Bruce Skelton.

Dynatroned · 26th Aug 2018, 9:44 pm

Hello all,
I just wanted to thank dalgwcobl for info on these speakers because there is nothing else out there if you do a search for LS3238CR

I have just bought a set in auction because I needed a cheap set of large speakers for non-tinny music in a workshop. They were cheap, and are large!... But more surprising is they don't just sound OK, they are fantastic! Probably a match, if not better than the modern speakers in my house.

I am guessing these must have been quite expensive when new (whenever that was?)

One quick question though, what is the purpose of the cotton wool type material in the port at the top? I thought it was probably the work of a previous owner to tune the bass, but I see the ones pictured in this thread have the same, so must be from factory?

Cheers!

Edward Huggins · 26th Aug 2018, 10:45 pm

Yes, they are. It was to dampen the bass peaks. Most Dynatron loudspeaker enclosures used (budget) Goodmans units, but these are a shade better. Not many were made.

Dynatroned · 27th Aug 2018, 10:16 pm

Thanks Edward, much appreciated.
I haven't seen an enclosure like these. The bass is very controlled and detailed for sure, no boom, so that material must still be doing its job.

tigger449 · 2nd Sep 2018, 1:30 pm

Does anyone know anything about the CD780 cassette deck in these machines? Was it a Dynatron built deck or was it sourced from another manufacturer?

Edward Huggins · 2nd Sep 2018, 1:42 pm

These would have been sourced from the Far-East, possibly a Philips associate OEM supplier. Certainly Dynatron never made cassette mechanisms.

tigger449 · 2nd Sep 2018, 2:34 pm

Thanks, Edward. Do you know of anywhere I might find a service manual or if they were similar to any other units? Mine needs a bit of TLC...

Vintage Engr · 3rd Sep 2018, 6:33 pm

The circuit diagram & some service info for this range is in the R&TV servicing books, if that helps.

Dave.

Edward Huggins · 3rd Sep 2018, 8:28 pm

These are rather basic cassette decks, with straightforward push-button interlock mechanisms. There are just 2/3 belts. Keep the heads clean. You can do a basic service on this without reference to a Manual.

25th Aug 2015, 11:28 am	#1
skelton Retired Dormant Member Join Date: Aug 2015 Location: Hertfordshire, UK. Posts: 3	Dynatron SRX60 chassis I wonder if someone can help me. Amongst my masses of 1970's British Hi Fi, I Also have a lovely Dynatron Audio unit fitted with :- SRX60 chassis. Philips 22GC037/59 single-player turntable with GP401 Mk2 cartridge. CD780 Dolby cassette deck. Plus a beautiful pair of 3 way Semi Transmission Line speakers with an 8" bass 5" midrange and a 25mm dome tweeter - these speakers sound very nice even compared to eg my TDL transmission line speakers. My question is does anyone have any info on the SRX receiver, i.e. RMS power output etc. and any info on the speakers. Regards, Bruce Skelton Attached Thumbnails

14th Mar 2018, 1:46 pm	#2
skelton Retired Dormant Member Join Date: Aug 2015 Location: Hertfordshire, UK. Posts: 3	Re: Dynatron SRX 60 Bump.

14th Mar 2018, 1:58 pm	#3
Boater Sam Banned Join Date: Dec 2013 Location: Middlewich, Cheshire, UK. & Winter in the Philippines. Posts: 3,897	Re: Dynatron SRX60 chassis You seem to be kicking an empty can here unfortunately Bruce. It's unusual but it happens. Have you tried some of the more audio devoted forums? Or try lots of photos, it may jog some old audiophile's grey matter.

14th Mar 2018, 2:00 pm	#4
Nuvistor Dekatron Join Date: Aug 2013 Location: Wigan, Greater Manchester, UK. Posts: 9,431	Re: Dynatron SRX60 chassis Cannot help with info but there 3 places online selling the service manual for the SRX60. __________________ Frank

14th Mar 2018, 2:13 pm	#5
Andrew2 Nonode Join Date: Mar 2010 Location: Dukinfield, Cheshire, UK. Posts: 2,037	Re: Dynatron SRX60 chassis There's a short thread here: https://www.vintage-radio.net/forum/...d.php?t=144496 __________________ Andy G1HBE.

14th Mar 2018, 8:24 pm	#6
dalgwcobl Pentode Join Date: Dec 2008 Location: Royston, Hertfordshire, UK. Posts: 131	Re: Dynatron SRX60 chassis There is another recent thread about an SRX60 system, to which I have responded. I have service data somewhere if you are interested. (I wrote it many years ago!) The amplifier is rated at 30 watts RMs per channel at, I think, 0.1%THD. The speakers - yours are the mahogany versions, I have the san-domingo rosewood contemporary LS3238CR? and the walnut period versions, but I can't remember the model numbers. I'll dig the service data out. Without repeating myself too much, the drive units in the speakers are made by Danish company Peerless. We thought, at the time, that these were the best speakers we'd made. They are bass reflex enclosures and rated at 50 watts DIN.

14th Mar 2018, 8:25 pm	#7
dalgwcobl Pentode Join Date: Dec 2008 Location: Royston, Hertfordshire, UK. Posts: 131	Re: Dynatron SRX60 chassis Sorry - just realised that is the thread referred to by Andrew2!

4th Apr 2018, 1:51 pm	#8
skelton Retired Dormant Member Join Date: Aug 2015 Location: Hertfordshire, UK. Posts: 3	Re: Dynatron SRX60 chassis Ok thanks. Any info you have would be interesting. Regards, Bruce Skelton.

26th Aug 2018, 9:44 pm	#9
Dynatroned Retired Dormant Member Join Date: Aug 2018 Location: Cumbria, UK. Posts: 2	Re: Dynatron SRX60 chassis Hello all, I just wanted to thank dalgwcobl for info on these speakers because there is nothing else out there if you do a search for LS3238CR I have just bought a set in auction because I needed a cheap set of large speakers for non-tinny music in a workshop. They were cheap, and are large!... But more surprising is they don't just sound OK, they are fantastic! Probably a match, if not better than the modern speakers in my house. I am guessing these must have been quite expensive when new (whenever that was?) One quick question though, what is the purpose of the cotton wool type material in the port at the top? I thought it was probably the work of a previous owner to tune the bass, but I see the ones pictured in this thread have the same, so must be from factory? Cheers!

26th Aug 2018, 10:45 pm	#10
Edward Huggins Dekatron Join Date: Sep 2015 Location: Southwold, Suffolk, UK. Posts: 8,327	Re: Dynatron SRX60 chassis Yes, they are. It was to dampen the bass peaks. Most Dynatron loudspeaker enclosures used (budget) Goodmans units, but these are a shade better. Not many were made. __________________ Edward.

27th Aug 2018, 10:16 pm	#11
Dynatroned Retired Dormant Member Join Date: Aug 2018 Location: Cumbria, UK. Posts: 2	Re: Dynatron SRX60 chassis Thanks Edward, much appreciated. I haven't seen an enclosure like these. The bass is very controlled and detailed for sure, no boom, so that material must still be doing its job.

2nd Sep 2018, 1:30 pm	#12
tigger449 Retired Dormant Member Join Date: Jun 2013 Location: Norwich, Norfolk, UK. Posts: 59	Re: Dynatron SRX60 chassis Does anyone know anything about the CD780 cassette deck in these machines? Was it a Dynatron built deck or was it sourced from another manufacturer?

2nd Sep 2018, 1:42 pm	#13
Edward Huggins Dekatron Join Date: Sep 2015 Location: Southwold, Suffolk, UK. Posts: 8,327	Re: Dynatron SRX60 chassis These would have been sourced from the Far-East, possibly a Philips associate OEM supplier. Certainly Dynatron never made cassette mechanisms. __________________ Edward.

2nd Sep 2018, 2:34 pm	#14
tigger449 Retired Dormant Member Join Date: Jun 2013 Location: Norwich, Norfolk, UK. Posts: 59	Re: Dynatron SRX60 chassis Thanks, Edward. Do you know of anywhere I might find a service manual or if they were similar to any other units? Mine needs a bit of TLC...

3rd Sep 2018, 6:33 pm	#15
Vintage Engr Heptode Join Date: Jan 2008 Location: Shrewsbury, Shropshire, UK. Posts: 838	Re: Dynatron SRX60 chassis The circuit diagram & some service info for this range is in the R&TV servicing books, if that helps. Dave.

3rd Sep 2018, 8:28 pm	#16
Edward Huggins Dekatron Join Date: Sep 2015 Location: Southwold, Suffolk, UK. Posts: 8,327	Re: Dynatron SRX60 chassis These are rather basic cassette decks, with straightforward push-button interlock mechanisms. There are just 2/3 belts. Keep the heads clean. You can do a basic service on this without reference to a Manual. __________________ Edward.