Elpico car radio ID - UK Vintage Radio Repair and Restoration Discussion Forum

MALC SCOTT · 28th Dec 2016, 3:33 pm

Hi, i have picked up an old Elpico car radio which i intend to fit to my 1957 Standard 10. I need to know the model number of it as i need a cct diagram to repair it. Here are some pics, Malc.

Herald1360 · 28th Dec 2016, 11:24 pm

From the look of that, you're probably looking at AF11x problems in that module.

As a radio, it's a bit late for a Standard 10- that would have had a valve or possibly a hybrid set in the late '50s.

Biggles · 28th Dec 2016, 11:47 pm

Should be fairly straightforward to fix. As has been said, that module probably has some AF117's in it. The output stages on this type of radio often consisted of a power transistor (probably the one on the back panel) in class A feeding an output transformer a bit like a typical single ended valve output stage. If the radio had the correct supply fuse fitted this may have saved the output transistor from frying itself if there was a fault, otherwise this may be a good place to start if you have absolutely no output or the whole set takes too much current.
Alan.

'LIVEWIRE?' · 29th Dec 2016, 9:56 am

That (TO-3) Transistor, almost certainly an AD149 or OC26, is the output device, and, as Alan(Biggles) says, drives the speaker via a transformer. Typical current consumption for radios of this type is ca, 600-700mA, or about 800-900mA including the pilot bulb, at 13.8V (i.e. from a nominal 12v supply.

boxdoctor · 29th Dec 2016, 11:04 am

Hi Malc,
As far as I remember, the Standard 10 is positive earth. Is the radio also positive earth (or switchable between the two)?
Would be a good idea to check before powering it from the car.....

Tony.

28th Dec 2016, 3:33 pm	#1
MALC SCOTT Octode Join Date: Aug 2006 Location: Willington, County Durham, UK. Posts: 1,499	Elpico car radio ID Hi, i have picked up an old Elpico car radio which i intend to fit to my 1957 Standard 10. I need to know the model number of it as i need a cct diagram to repair it. Here are some pics, Malc. Attached Thumbnails __________________ Malc Scott

28th Dec 2016, 11:24 pm	#2
Herald1360 Dekatron Join Date: Feb 2007 Location: Leominster, Herefordshire, UK. Posts: 16,536	Re: Elpico car radio ID From the look of that, you're probably looking at AF11x problems in that module. As a radio, it's a bit late for a Standard 10- that would have had a valve or possibly a hybrid set in the late '50s. __________________ ....__________ ....\|____\|\|__\|__\_____ .=.\| _---\__\|__\|_---_\|. .........O..Chris....O

28th Dec 2016, 11:47 pm	#3
Biggles Rest in Peace Join Date: Feb 2004 Location: Hexham, Northumberland, UK. Posts: 2,234	Re: Elpico car radio ID Should be fairly straightforward to fix. As has been said, that module probably has some AF117's in it. The output stages on this type of radio often consisted of a power transistor (probably the one on the back panel) in class A feeding an output transformer a bit like a typical single ended valve output stage. If the radio had the correct supply fuse fitted this may have saved the output transistor from frying itself if there was a fault, otherwise this may be a good place to start if you have absolutely no output or the whole set takes too much current. Alan.

29th Dec 2016, 9:56 am	#4
'LIVEWIRE?' Rest in Peace Join Date: Mar 2006 Location: N.W. Oxfordshire(Chipping Norton) Posts: 7,306	Re: Elpico car radio ID That (TO-3) Transistor, almost certainly an AD149 or OC26, is the output device, and, as Alan(Biggles) says, drives the speaker via a transformer. Typical current consumption for radios of this type is ca, 600-700mA, or about 800-900mA including the pilot bulb, at 13.8V (i.e. from a nominal 12v supply.

29th Dec 2016, 11:04 am	#5
boxdoctor Rest in Peace Join Date: Sep 2010 Location: Ripley, Derbyshire, UK. Posts: 785	Re: Elpico car radio ID Hi Malc, As far as I remember, the Standard 10 is positive earth. Is the radio also positive earth (or switchable between the two)? Would be a good idea to check before powering it from the car..... Tony.