RE: xiang sheng 708B

Posted by petercapo (A) on August 27, 2016 at 09:44:21

In Reply to: xiang sheng 708B posted by SOUNDY on August 27, 2016 at 03:31:41:

I Googled xiang sheng 708B. If the images I saw are of the same thing you have, it looks like it might already have film capacitors that I assume are coupling the audio signal, though I cannot know for sure from the images alone. Space looks short, but you might be able to substitute electrolytic capacitors of a larger value. You might change the diodes, too.

But, given the sound quality you describe, the changes you are considering may or may not make any difference. Have you tired different tubes? The brittle, lightweight sound quality may just be inherent in the circuit design and changing parts might not help at all.

In any case, you'd need to get a schematic or reverse-engineer a schematic yourself because whoever works on it needs to be able to find their way around. You'd need to make a list of all the existing part values and ratings as a reference.

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Follow Ups Full Thread

Topic - xiang sheng 708B - SOUNDY 03:31:41 08/27/16 (20)

REYou should do the mods yourself - DAK 15:10:41 08/27/16 (1)

RE: REYou should do the mods yourself - SOUNDY 15:44:24 08/27/16 (0)

RE: xiang sheng 708B - petercapo 09:44:21 08/27/16 (5)

RE: xiang sheng 708B - SOUNDY 13:27:18 08/27/16 (4)

RE: xiang sheng 708B - petercapo 16:22:58 08/27/16 (3)

RE: xiang sheng 708B - SOUNDY 01:43:36 08/28/16 (2)

RE: xiang sheng 708B - hennfarm 16:34:48 08/31/16 (1)

RE: xiang sheng 708B - SOUNDY 05:34:39 09/14/16 (0)

Sell it and buy something better - Triode_Kingdom 06:58:53 08/27/16 (11)

What Triode said..._nT - Cleantimestream 17:03:14 08/27/16 (0)

RE: Sell it and buy something better - SOUNDY 07:27:23 08/27/16 (9)

RE: Sell it and buy something better - Frihed89 08:02:09 08/27/16 (8)

RE: Sell it and buy something better - SOUNDY 08:39:14 08/27/16 (7)

RE: Sell it and buy something better - Triode_Kingdom 10:24:41 08/27/16 (6)

RE: Sell it and buy something better - SOUNDY 13:57:01 08/27/16 (5)

Actually, that does not make sense - Chip647 15:13:06 08/27/16 (3)

RE: Actually, that does not make sense - SOUNDY 16:04:35 08/27/16 (2)

It would be new parts - Chip647 17:24:32 08/27/16 (1)

RE: It would be new parts - Frihed89 01:30:58 08/28/16 (0)

I think TK's point.... - Uncle Mike 15:10:53 08/27/16 (0)

Follow Ups

RE: xiang sheng 708B - petercapo 09:44:21 08/27/16 (5)

RE: xiang sheng 708B - SOUNDY 13:27:18 08/27/16 (4)

RE: xiang sheng 708B - petercapo 16:22:58 08/27/16 (3)

RE: xiang sheng 708B - SOUNDY 01:43:36 08/28/16 (2)

RE: xiang sheng 708B - hennfarm 16:34:48 08/31/16 (1)

RE: xiang sheng 708B - SOUNDY 05:34:39 09/14/16 (0)

RE: xiang sheng 708B

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