UK Vintage Radio Repair and Restoration Powered By Google Custom Search Vintage Radio Service Data

Go Back   UK Vintage Radio Repair and Restoration Discussion Forum > Offered and Wanted Messages > Sets, Parts and Service Information Offered (private sellers only, exact price required, no swaps)

Notices

Sets, Parts and Service Information Offered (private sellers only, exact price required, no swaps) You may announce components or sets for sale or offered free here. Private collectors only - no traders. You must include an exact price. No swaps.

Closed Thread
 
Thread Tools
Old 8th Oct 2018, 9:04 pm   #1
greenstar
Octode
 
greenstar's Avatar
 
Join Date: Jul 2011
Location: Leicester, Leics. UK.
Posts: 1,101
Default Bag of chips

I don't know what these are, but offered here in case they are of use to anyone. There appear to be no markings. 20 pins each on a big heatsink.
3.50 postage
Tony
Attached Thumbnails
Click image for larger version

Name:	P1100734.JPG
Views:	298
Size:	96.8 KB
ID:	170532  
greenstar is offline  
Old 8th Oct 2018, 9:19 pm   #2
Reelman
Heptode
 
Reelman's Avatar
 
Join Date: Aug 2008
Location: Rotherham, South Yorkshire, UK.
Posts: 625
Default Re: Bag of chips

Hi Tony,
I would like to express an interest in these chips please.
Many thanks,
Peter
Reelman is offline  
Old 8th Oct 2018, 10:39 pm   #3
jayceebee
Hexode
 
jayceebee's Avatar
 
Join Date: Jun 2007
Location: Durham, County Durham, UK.
Posts: 259
Default Re: Bag of chips

With 20 pins they possibly could be the original version of the Plessey SL901 used in the RBM A823 series of sets, first seen in the very rare hybrid dual standard 22" Murphy CV2210D and Bush CTV174D. Later ICs came in a normal looking 24 pin package but the two pins at each end were unused. Some early decoders were drilled for both versions

John.

Last edited by jayceebee; 8th Oct 2018 at 10:45 pm. Reason: more info
jayceebee is online now  
Old 8th Oct 2018, 10:41 pm   #4
Reelman
Heptode
 
Reelman's Avatar
 
Join Date: Aug 2008
Location: Rotherham, South Yorkshire, UK.
Posts: 625
Default Re: Bag of chips

I must admit that I thought at first that these were Plessey SL403 amplifiers but I see that these had only 10 widely spaced pins rather than the 20 shown here.
Peter
Reelman is offline  
Old 9th Oct 2018, 1:50 pm   #5
ionburn
Hexode
 
ionburn's Avatar
 
Join Date: Dec 2014
Location: Lincoln, Lincolnshire, UK.
Posts: 368
Default Re: Bag of chips

Quote:
Originally Posted by jayceebee View Post
With 20 pins they possibly could be the original version of the Plessey SL901 used in the RBM A823 series of sets, first seen in the very rare hybrid dual standard 22" Murphy CV2210D and Bush CTV174D. Later ICs came in a normal looking 24 pin package but the two pins at each end were unused.
Yes I remember these. We had a jig with sockets for testing at the comapany I worked. I have one or two of these IC's which I bought (unmarked) from J Birkett at the time in a goody bag so I was able to test them and determine that was what they were and that they functioned. I have also got some of those with widely spaced pins, along with John's suggested circuit sheets which he provided at the time.
ionburn is offline  
Old 9th Oct 2018, 3:25 pm   #6
Craig Sawyers
Octode
 
Craig Sawyers's Avatar
 
Join Date: Nov 2010
Location: Oxford, UK.
Posts: 1,437
Default Re: Bag of chips

Then there was the infamous 1968 launch of the IC10 power amplifier in identical packaging from Sinclair. Apparently sourced from Plessey, which would explain the similarity. The IC10 had 10 pins.

http://www.vk6fh.com/vk6fh/sinclair%20ic10.htm

Correcting for inflation since 1968 that works out at 50 each, or 100 per stereo pair. For a 5W amp.

Rather off-topic, other than the packaging.

Craig
Craig Sawyers is offline  
Old 9th Oct 2018, 3:33 pm   #7
neil29
Heptode
 
neil29's Avatar
 
Join Date: Dec 2004
Location: Newport, Gwent, UK.
Posts: 644
Default Re: Bag of chips

Hi Peter, Are you still interested in these?. because if not could I have them please Tony as I have a few A823 chassis sets that could use them if the current ones fail for any reason.


Cheers
Neil.
neil29 is offline  
Old 9th Oct 2018, 6:59 pm   #8
Reelman
Heptode
 
Reelman's Avatar
 
Join Date: Aug 2008
Location: Rotherham, South Yorkshire, UK.
Posts: 625
Default Re: Bag of chips

Hi Neil,
No problem at all.
Tony, I release my interest in the chips in favour of Neil if that is ok.

It was the 10 pin Plessey amps that I was really after if anyone still has a spare...
Back in ‘71 I bought one from Superadio in Liverpool for 1 and had a lot of fun with it. Unfortunately they would die if you as much as looked hard at them. Being a poor schoolboy I would take it back and get it swopped for another one. This happened several times until they ran out and refunded my pound. Not seen one since although I have bought more recently an unused Sinclair IC10 but won’t risk connecting it up!
Good luck with them Neil!
Peter
Reelman is offline  
Old 11th Oct 2018, 6:34 pm   #9
greenstar
Octode
 
greenstar's Avatar
 
Join Date: Jul 2011
Location: Leicester, Leics. UK.
Posts: 1,101
Default Re: Bag of chips

Hi Neil,
yes, you can certainly have them. PM me your address and I will pack and post them to you.
Tony
greenstar is offline  
Old 11th Oct 2018, 7:33 pm   #10
neil29
Heptode
 
neil29's Avatar
 
Join Date: Dec 2004
Location: Newport, Gwent, UK.
Posts: 644
Default Re: Bag of chips

Hi Tony, You have a PM.


Cheers
Neil.
neil29 is offline  
Closed Thread

Thread Tools



All times are GMT +1. The time now is 4:05 pm.


All information and advice on this forum is subject to the WARNING AND DISCLAIMER located at https://www.vintage-radio.net/rules.html.
Failure to heed this warning may result in death or serious injury to yourself and/or others.


Powered by vBulletin®
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Copyright ©2002 - 2018, Paul Stenning.