Pre-Amp

Mindcrime · 24th April 2007, 07:32 PM

Hey guys,
I have been looking for a budget pre-amp kit. although not a kit I thought this looked interesting..any thoughts?

http://cgi.ebay.com/ws/eBayISAPI.dll...MEWA:IT&ih=005

dsavitsk · 24th April 2007, 08:03 PM

It's not grounded properly.

Tweeker · 24th April 2007, 08:33 PM

12AU7 wouldnt be my first choice for a preamp.

Please tell me the wall wart in the lower left picture isnt the outboard power supply.

Mindcrime · 24th April 2007, 08:52 PM

good catch, but I don't think it is.... lol

SY · 24th April 2007, 08:57 PM

12AU7. Two wire power cord. Pass.

Mindcrime · 24th April 2007, 09:13 PM

Thanks for the input, any suggestions?

Sonusthree · 24th April 2007, 09:28 PM

Quote:

Originally posted by Mindcrime
Thanks for the input, any suggestions?

Email the seller with some questions about the supply at least. I suspect that it is a relatively low voltage device but I may be wrong (there's a millionth time for everything

). This might be why it is so cheap. It may well be working on a 12 or 24V supply with (or without) a voltage doubler or similar to supply a viable B+. Ask the guy and see what he says.

I'm really enjoying my experimentation with low voltage tube stuff so I'd hate to pay for anything (so easily DIY'able) that wasn't a proper (scary voltages) circuit.

Regards,
Martin.

jduffy · 25th April 2007, 12:12 AM

I'm cautious when I see someone use the word "phylosophy".

Tweeker · 25th April 2007, 12:25 AM

Phylosophy is a perfectly cromulent word.

FastEddy · 25th April 2007, 12:36 AM

" ... a perfectly cromulent ... " pre-amp = http://www.bottlehead.com/et/adobesp.../foreplay3.htm

Granted, about 2X the amount shown on the eBay dice, but at least its grounded properly ... just add solder.

24th April 2007, 07:32 PM	#1
Mindcrime diyAudio Member Join Date: Apr 2007	Pre-Amp Hey guys, I have been looking for a budget pre-amp kit. although not a kit I thought this looked interesting..any thoughts? http://cgi.ebay.com/ws/eBayISAPI.dll...MEWA:IT&ih=005

24th April 2007, 08:03 PM	#2
dsavitsk diyAudio Member Join Date: Jan 2005 Location: Chicago	It's not grounded properly. __________________ http://www.ecpaudio.com

24th April 2007, 08:33 PM	#3
Tweeker diyAudio Member Join Date: Dec 2004 Location: Cincinnati, Ohio	12AU7 wouldnt be my first choice for a preamp. Please tell me the wall wart in the lower left picture isnt the outboard power supply. __________________ Be sure your foil hat has a good low impedance ground.

24th April 2007, 08:57 PM	#5
SY diyAudio Moderator Join Date: Oct 2002 Location: Austin, TX Blog Entries: 1	12AU7. Two wire power cord. Pass. __________________ “Listening to records is like ****ing a picture of Brigitte Bardot.” - Sergiu Celibidache

25th April 2007, 12:25 AM	#9
Tweeker diyAudio Member Join Date: Dec 2004 Location: Cincinnati, Ohio	Phylosophy is a perfectly cromulent word. __________________ Be sure your foil hat has a good low impedance ground.

24th April 2007, 08:52 PM	#4
Mindcrime diyAudio Member Join Date: Apr 2007	good catch, but I don't think it is.... lol

24th April 2007, 09:13 PM	#6
Mindcrime diyAudio Member Join Date: Apr 2007	Thanks for the input, any suggestions?

25th April 2007, 12:12 AM	#8
jduffy diyAudio Member Join Date: Oct 2006	I'm cautious when I see someone use the word "phylosophy".

25th April 2007, 12:36 AM	#10
FastEddy diyAudio Member Join Date: Jun 2006 Location: North Californie	" ... a perfectly cromulent ... " pre-amp = http://www.bottlehead.com/et/adobesp.../foreplay3.htm Granted, about 2X the amount shown on the eBay dice, but at least its grounded properly ... just add solder. __________________ Over compression is a problem with modern CD recordings

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