Welcome to Australia's only Vintage Radio and Television discussion forums. You are not logged in. Please log in below, apply for an account or retrieve your password.
Australian Vintage Radio Forums
  Home  ·  About Us  ·  Discussion Forums  ·  Glossary  ·  Outside Links  ·  Policies  ·  Services Directory  ·  Safety Warnings  ·  Tutorials

Tech Talk

Forum home - Go back to Tech talk

 Identification of radiogram chassis needed
« Back · 1 · 2 · Next »
 Return to top of page · Post #: 16 · Written at 2:29:30 PM on 6 June 2020.
Trobbins's avatar
 Location: Melbourne, VIC
 Member since 11 July 2012
 Member #: 1179
 Postcount: 56

Super. Keven Chants site doesn't have much for GE.

Yes the 6V4 was used as I had some spare at the time of testing, but is pushed to or over its peak current spec limits if both channels were tested with continuous signals. I will try and locate the one 6CA4 I think I now have, as that does cover the likely worst-case loading using PSUD2. The PT heater winding is getting off lightly as the redio/preamp section is not being powered.


 
 Return to top of page · Post #: 17 · Written at 3:36:54 PM on 6 June 2020.
Vintage Pete's avatar
 Location: Albury, NSW
 Member since 1 May 2016
 Member #: 1919
 Postcount: 2048

This is the GE model I referred to early in the post as the model that often sells for big bucks. It's not your model and I've included this link just for interest as we just don't get many GE Radiogram on this site.. rarely get any Radiograms on this site, which is a shame as I have a strong interest in Radiograms and I have many of them , TVs too ! But no interest in radios.
Here is the link if people want to have a look.

https://www.ebay.com.au/itm/Mid-Century-General-Electric-Radiogram-Danish-style/324029891708?_trkparms=ispr%3D1&hash=item4b71afc47c:g:QcIAAOSw8S9eDauD


 
 Return to top of page · Post #: 18 · Written at 4:14:42 PM on 6 June 2020.
MonochromeTV's avatar
 Location: Melbourne, VIC
 Member since 20 September 2011
 Member #: 1009
 Postcount: 1179

Yes Pete,

That one is the 1968 to 1975 model Scandia RSC1.


 
 Return to top of page · Post #: 19 · Written at 4:37:56 PM on 6 June 2020.
Trobbins's avatar
 Location: Melbourne, VIC
 Member since 11 July 2012
 Member #: 1179
 Postcount: 56

GE was the needle in a haystack search term I needed - much appreciated - it appears to be a GE Lowboy Stereo - woop woop:

http://multisonics.blogspot.com/2015/04/general-electric-lowboy-stereo-very.html

PS - oops almost! That particular link has the solid state version, but almost identical front fascia.


 
 Return to top of page · Post #: 20 · Written at 4:47:36 PM on 6 June 2020.
GTC's avatar
 GTC
 Location: Sydney, NSW
 Member since 28 January 2011
 Member #: 823
 Postcount: 6678

GE was the needle in a haystack search term I needed

Strikes me as very strange that yours doesn't have 'General Electric' and/or its logo anywhere on it.


 
 Return to top of page · Post #: 21 · Written at 4:50:30 PM on 6 June 2020.
Vintage Pete's avatar
 Location: Albury, NSW
 Member since 1 May 2016
 Member #: 1919
 Postcount: 2048

Hmm see what I mean about black and silver!
I'm not sure what your plans are regarding your chassis as you have no cabinet.
But you will be able to sell it easy as a restored chassis...lots of these units are in demand.
All the best and good luck with it.

Pete


 
 Return to top of page · Post #: 22 · Written at 5:24:44 PM on 6 June 2020.
MonochromeTV's avatar
 Location: Melbourne, VIC
 Member since 20 September 2011
 Member #: 1009
 Postcount: 1179

I should of mentioned two posts ago that Trobbins chassis comes out a Granville Model RS8V1. The only picture of it I can find so far is of very poor quality.

The Multisonics one is a Ranger Model 111S & is solid-state.


 
 Return to top of page · Post #: 23 · Written at 5:45:49 PM on 6 June 2020.
Trobbins's avatar
 Location: Melbourne, VIC
 Member since 11 July 2012
 Member #: 1179
 Postcount: 56

The 'ripped' assembly was cheap and nearby on ebay about 6 years ago, so I got it to check out the amp chassis as it looked like it had potential and was 'Australian'. I restored just the amp chassis to suit as a guitar amp, as an example of what the 6DX8 could achieve in overdrive, as there is always an aussie DIY interest in what can be cobbled together from cheap and local parts. The joy is in the journey, and even after 6 years there is still some miles in it (so to speak)!

I made a schematic of the original amp chassis, although it would always be nice to find a service schematic some day just to round off that part of the journey, or even a product brochure.

I still have the front fascia chassis, so happy to hand that over gratis to anyone with a restoration need in the decades to come, although given it wasn't a common model it could be a rare request.


 
 Return to top of page · Post #: 24 · Written at 5:50:43 PM on 6 June 2020.
Vintage Pete's avatar
 Location: Albury, NSW
 Member since 1 May 2016
 Member #: 1919
 Postcount: 2048

Monochrome.
No I don't know the model and I don't think I've come across one in all these years .
It must of been not very popular at the time as most I've seen before. Anyway we got there in the end and found what unit it came from and it kept us all busy haha


 
 Return to top of page · Post #: 25 · Written at 5:57:22 PM on 6 June 2020.
Trobbins's avatar
 Location: Melbourne, VIC
 Member since 11 July 2012
 Member #: 1179
 Postcount: 56

Got to do something while HRSA meetings are in abeyance!

And thanx so much to all viewers Smile


 
 Return to top of page · Post #: 26 · Written at 6:58:37 PM on 6 June 2020.
MonochromeTV's avatar
 Location: Melbourne, VIC
 Member since 20 September 2011
 Member #: 1009
 Postcount: 1179

There is a (not very good) picture of the "Granville" here:

https://trove.nla.gov.au/newspaper/article/105893218/11618276


 
 Return to top of page · Post #: 27 · Written at 7:09:03 PM on 6 June 2020.
Brad's avatar
 Administrator
 Location: Naremburn, NSW
 Member since 15 November 2005
 Member #: 1
 Postcount: 7290

Document uploaded to Post 15.


‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
A valve a day keeps the transistor away...

 
 Return to top of page · Post #: 28 · Written at 7:29:55 PM on 6 June 2020.
Trobbins's avatar
 Location: Melbourne, VIC
 Member since 11 July 2012
 Member #: 1179
 Postcount: 56

Thanx so much for the schematic and model RS8V1C identification. The only running update on my amp chassis is an added 250pF feedback cap, presumably for enhanced stability margin.

I'll have to get an AVO-8 now to confirm the voltages Smile

PS. The radiomuseum website has the model listed as Granville RS8V1.


 
 Return to top of page · Post #: 29 · Written at 8:37:02 PM on 6 June 2020.
GTC's avatar
 GTC
 Location: Sydney, NSW
 Member since 28 January 2011
 Member #: 823
 Postcount: 6678

I'll have to get an AVO-8 now to confirm the voltages.

Shouldn't be too hard to get one locally for just a few dollars. I have seem them go cheaply at Sydney HRSA auctions -- where vintage test gear is not usually very popular. The problem these days is the special 15 volt battery for the ohms x 100 range.

Avo and Taylor meters were the standards back when I was doing my training. They were considered to be student proof.


 
 Return to top of page · Post #: 30 · Written at 8:40:48 PM on 6 June 2020.
Ian Robertson's Gravatar
 Location: Belrose, NSW
 Member since 31 December 2015
 Member #: 1844
 Postcount: 2363

Yes the schematic shows V8 as a 6CA4. Wise....


 
« Back · 1 · 2 · Next »
 You need to be a member to post comments on this forum.

Sign In

Username:
Password:
 Keep me logged in.
Do not tick box on a computer with public access.