Funnily enough I used to have an obscure data book on olddevices which I
gave to aan old chap some time ago. One item I recall was a silicon
replacement for germanium transistors. I thought this was impossible due to
the difference in their voltage drop, but apparently they worked well enough
at the time.

I think it was mainly for the AC series of transistors.
Brian

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This newsgroup posting comes to you directly from...
The Sofa of Brian Gaff...

Blind user, so no pictures please!
"Trevor Wilson" wrote in message
...
On 10/06/2016 9:04 PM, Phil Allison wrote:
Trevor Wilson wrote:

**If you need germanium devices, Rockby have some interesting ones in
their specials list.

** I have an AD162 in my old bits box - never used a germanium type in
30 years.

**I have AD162 AND 161s in my box of bits. I needed a pair about 18 months
ago. They turn up from time to time.


Amazing those caps were all good.

** Yeah - all ELNA brand, like I used to buy from Radio Despatch in the
70s.

**As a young buck, I caught the train to RDS to bus _A_ capacitor. I was
presented with an ELNA and a (larger) Ducon. I asked for the Ducon
(because it was Aussie made). The guy behind the counter just muttered:
"The bigger the cap, the bigger the bang."



I just serviced a
3 year old M-DAC. I started marking the bad electros, until I realised
it would be easier to mark the good ones. I have to replace around 60
caps! In a DAC!


** SMD ones, I bet.

**Nope. Every one was through hole. Most had bulging tops. Funnily enough,
the M-DAC also uses 20 or so OSCON caps. I pulled a handful out and they
measured fine. Better than fine, actually. Pretty lucky, since I couldn't
source more OSCONs in the values required, unless I bought 1,000 of the
suckers. OSCONs not cheap. Also through hole types.


Too much heat during assembly allows the juice out.

**Yep. Seen it, but not in this case. Just crappy caps. Voltages on the
caps were well within reason.


--
Trevor Wilson
www.rageaudio.com.au

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