Power op amp driving valve in A2

If they glow, this is the place to be
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pre65
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#61

Post by pre65 »

Firstly it is not very loud, but that was expected.

I need a tad more HT so the first cap (1uf) will be replaced by a 2uf when it's powered down.

The TDA voltage is a gnats under 25v, which was the maximum recommended, and the heaters are at 12.4v DC. There is no noise from the speakers when idling, although the 0-260v mains transformer did buzz a bit. That was almost cured by mounting on some soft plastic strips and not tightening the fixing screws so tight.

Sound quality is quite good, but I would prefer it a bit louder. :)
The only thing necessary for the triumph of evil is for good men to do nothing.

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G-Popz THE easy listening connoisseur. (Philip)
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pre65
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Location: North Essex/Suffolk border.

#62

Post by pre65 »

Strangely, when I took this round to a friends house it sounded absolutely CRAP.

When I got home it was back to being good. :?

Anyway, it was really not loud enough, so this project has been wound up and attention turned to a similar effort using some CV2799 I had to hand.

These have responded MUCHbetter. :D
The only thing necessary for the triumph of evil is for good men to do nothing.

Edmund Burke

G-Popz THE easy listening connoisseur. (Philip)
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Mike H
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#63

Post by Mike H »

That was really weird wasn't it? The treble was AWOL ....

Shame as it was a good idea
 
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