Dead RIC2 - UK Vintage Radio Repair and Restoration Discussion Forum

John12868 · 10th Nov 2008, 12:14 pm

Hi Guys,

I've picked up at the weekend (amongst other things) a very battered mustard Roberts RIC2.

However, when connected to a PP9, all I get is a "click" and a little scratching sound.

Any suggestions as to what vould bring audio back to this attractive little radio?

Regards

John

mickjjo · 10th Nov 2008, 12:56 pm

Hi John, First check out this article:-

http://www.vintage-radio.com/recent-...erts-ric2.html

Usual problems with these are dirty switch contacts, dodgy earphone sockets or if you are unlucky, the TAD100 chip that does most of the work at the front end.

.

Regards, Mick.

Mullard · 10th Nov 2008, 6:42 pm

I am currently looking at a Bush TR230 that is a similar design (TAD100, LP1175 IF filter). The Bush has only 2 transistors in the o/p (AC187, AC188) driven directly from the pre-amp in the TAD100. The Bush has a very similar fault. On switch on just a loud click, no hiss, nothing. Checking through with a scope, the oscillator is OK, the IF is OK, and I even get audio at pin 4 on the TAD100 (pre-amp input) when tuned to a station, but nothing out of pin 6 (pre-amp o/p). Both output transistors are also blown. I have just ordered 2 new o/p transistors and a replacement TAD100 (not new).

Regards,
John

10th Nov 2008, 12:14 pm	#1
John12868 Retired Dormant Member Join Date: Nov 2006 Location: Crayford, London, UK. Posts: 181	Dead RIC2 Hi Guys, I've picked up at the weekend (amongst other things) a very battered mustard Roberts RIC2. However, when connected to a PP9, all I get is a "click" and a little scratching sound. Any suggestions as to what vould bring audio back to this attractive little radio? Regards John

10th Nov 2008, 12:56 pm	#2
mickjjo Rest in Peace Join Date: Jul 2004 Location: Dartford, Kent, UK. Posts: 1,661	Re: Dead RIC2 Hi John, First check out this article:- http://www.vintage-radio.com/recent-...erts-ric2.html Usual problems with these are dirty switch contacts, dodgy earphone sockets or if you are unlucky, the TAD100 chip that does most of the work at the front end. . Regards, Mick.

10th Nov 2008, 6:42 pm	#3
Mullard Pentode Join Date: Jul 2007 Location: Clophill, Bedfordshire, UK. Posts: 127	Re: Dead RIC2 I am currently looking at a Bush TR230 that is a similar design (TAD100, LP1175 IF filter). The Bush has only 2 transistors in the o/p (AC187, AC188) driven directly from the pre-amp in the TAD100. The Bush has a very similar fault. On switch on just a loud click, no hiss, nothing. Checking through with a scope, the oscillator is OK, the IF is OK, and I even get audio at pin 4 on the TAD100 (pre-amp input) when tuned to a station, but nothing out of pin 6 (pre-amp o/p). Both output transistors are also blown. I have just ordered 2 new o/p transistors and a replacement TAD100 (not new). Regards, John