This is development of my simple GC preamplifier that I made some time ago. Now it's two, or even three in one
Preamplifier
Just a simple preamplifer using single op-amp.
RIAA preamplifeir
Basic preamplifer updated with few components working as a RIAA correction. This section is basing on VSPS preamplifier (great work RJM!). When it's made as dual mono - second board can work as another gain stage in this PRE or output buffer. This should bring to live my analog
Supply
Simple supply. Two fixed voltage regulators + CRC filter.
Preamplifier
Just a simple preamplifer using single op-amp.
RIAA preamplifeir
Basic preamplifer updated with few components working as a RIAA correction. This section is basing on VSPS preamplifier (great work RJM!). When it's made as dual mono - second board can work as another gain stage in this PRE or output buffer. This should bring to live my analog
Supply
Simple supply. Two fixed voltage regulators + CRC filter.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
Preamplifier is working. No hum or any other 'special effects'. Picture below show this board in standard, stereo configuration.
documentation
documentation
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
hey guys,
Looks very nice! If you have any boards left, i'd very much like a stereo set! My implementation of the vsps is somewhat buggy (a little humm and some hiss).
No wonder, I hacked it together pretty quickly on veroboard with a psu i had lying around.
I'll send you an email.
Looks very nice! If you have any boards left, i'd very much like a stereo set! My implementation of the vsps is somewhat buggy (a little humm and some hiss).
No wonder, I hacked it together pretty quickly on veroboard with a psu i had lying around.
I'll send you an email.
I have got about 5 gold plated sets that I don't need, so if You are interested...
I would very much like to obtain a set as well (hope I'm not too late).
Jess
GeWa said:Veteran
The boards arrived today. Are you aware of the fact that they are not drilled?
Regards
Well at the price Veteran charges i don't mind drilling myself
Just wish i had mine, realle feel the urge to build a better RIAA than i have now
Best wishes and happy bulding
Ebbe
Well at the price Veteran charges i don't mind drilling myself
I also don't mind to drill them myself, I was just curious.
Just wish i had mine, realle feel the urge to build a better RIAA than i have now
I won't post a picture of my boards than, I don't want to upset you to much.
Edit: I was a bit hasty with my comment. They are drilled but on the component side the holes are covered with a kind of film (soldermask?). You can easy punch it through with sharp point.
Regards
I won't post a picture of my boards than, I don't want to upset you to much.
Edit: I was a bit hasty with my comment. They are drilled but on the component side the holes are covered with a kind of film (soldermask?). You can easy punch it through with sharp point.
Regards [/B]
Please don't post pictures, i might be in need of a shrink then
Well, it sounds like it's the soldermask covering. no problems then.
all the best
Some holes can be clogged by solder mask. I like to have mask on both side of PCB (they look more professional and there is bigger contrast between background and description) and this is a normal think in single sided boards You can punch it through with when placing components pins.
GeWa, there is all you need:
http://www.geocities.com/rjm003.geo/rjmaudio/diy_pho5.html
GeWa, there is all you need:
http://www.geocities.com/rjm003.geo/rjmaudio/diy_pho5.html
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.
- Home
- Amplifiers
- Chip Amps
- GC/RIAA (simple) preamplifer