Wanted and For Sale

Forum home - Go back to Wanted and for sale

Ferris Cadet 234 Service Manual Wanted
« Back · 1 · Next »
Return to top of page · Post #: 1 · Written at 6:53:41 PM on 24 July 2013.
	MonochromeTV Location: Melbourne, VIC Member since 20 September 2011 Member #: 1009 Postcount: 1182
Hi all, I am looking for the manufacturers service manual for a 1960's transistorized Ferris Cadet 234. I already have the circuit diagram from the JR Transistor Radio 1966 Group C3 book. The JR version is only 2 pages & doesn't list the transistor types. Thank you & cheers. P.S. Brad, You reckon "a valve a day keeps the transistor away". Does that include 50+ year old germanium types?!!!!

Return to top of page · Post #: 2 · Written at 7:04:30 PM on 24 July 2013.
	Brad Administrator Location: Naremburn, NSW Member since 15 November 2005 Member #: 1 Postcount: 7301
P.S. Brad, You reckon "a valve a day keeps the transistor away". Does that include 50+ year old germanium types?!!!! Well... Maybe two valves a day in that case... ‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾ A valve a day keeps the transistor away...

Return to top of page · Post #: 3 · Written at 8:16:10 PM on 24 July 2013.
	Marcc Location: Wangaratta, VIC Member since 21 February 2009 Member #: 438 Postcount: 5254
The transistors themselves will likely have a number on them. e.g. 2N*** We may be able to trace them from that? The only Germanium transistors in 60's stuff that I have serviced of late are the 2N301's in the output. What I have noted is a lot of dry electrolytic's, oscillator transistor failures and horrid little caps of around 1/4'' dia by 1/2'' long exploding, cracking & failing, to the point that I treat them like wax papers..... automatic replace. Marc

Return to top of page · Post #: 4 · Written at 10:02:59 PM on 24 July 2013.
	MonochromeTV Location: Melbourne, VIC Member since 20 September 2011 Member #: 1009 Postcount: 1182
Thanks Marc. I just opened up the radio. The PCB is surrounded by a metal shield so it is difficult to see the transistor types. My eyesight is pretty poor but I think the transistors are as follows: AC125, AC127, AC128, AC172, AF116N, AF117N & AF117N. The electrolytics are the blue Philips type which I've found to be pretty reliable. However, this radio is riddled with .047μF Ducon Redcaps, which are the most unreliable capacitors I've ever seen. For those who are not familiar with Ducon Redcaps - they look like ceramic disc caps, have a red mark on top and were found in just about every Australian made transistor radio in the 1960's. They are the cause of lot of faults and will often show considerable leakage when measuring with a meter in the high ohms range.

Return to top of page · Post #: 5 · Written at 10:20:56 PM on 24 July 2013.
	Marcc Location: Wangaratta, VIC Member since 21 February 2009 Member #: 438 Postcount: 5254
Somewhere in the house move I have a rail of AC125's PNP Germanium. AF116N Germanium Diffusion type, most likely the oscillator, or mixer. Google type (e.g. AF 125 transistor) & look on Radio Museum for equivalents if there is a dud. Always good to know which components are proving to be somewhat unreliable. Marc

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

Wanted and For Sale

Sign In