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Forum 141

Sony 9-306

23 Posts
7 Users
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Doz
 Doz
(@doz)
Posts: 1519
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Topic starter
 
Posted by: PYE625

Hi Doz, sorry to read the above.

I believe an AF239 is an equivalent and there are a selection on ebay at not too silly prices.

Funny you should say that ... I've just unearthed a bag of them here. Just tacked one in , and it sort of works ish. Video is very washed out, and there's barely any sound. Not enough gain by the looks of it. I'll check my connections again tomorrow.

 
Posted : 06/05/2019 10:11 pm
glenz75
(@glenz75)
Posts: 76
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What a pain about the EHT flashing over, sounds like it may have killed one or more of those fragile old transistors. Hopefully you won't go through too much of battle to bring it back.

My You Tube Channel for those suffering from insomina - Youtube Glenz1975

 
Posted : 07/05/2019 12:43 am
Doz
 Doz
(@doz)
Posts: 1519
Prominent Member Registered
Topic starter
 

An update. TR301 (First IF Amp) replaced with AF239 ... a very slight and very crushed and disorted picture available on 625. Almost not visible, some weak sound. 405 slight signs of some sync every now and again, no sound.

Move to TR302 (a 2SA455) ... 8v present on the emitter. 7.8V on the base. 0V on the collector.... I'll fit another AF239!

 
Posted : 20/05/2019 8:03 pm
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