Tube Schematics

Ralf Biermann · 25th February 2010, 07:27 PM

Hello All,

I have added some info about tube schematics on my homepage.

Electronics

Some things are just theoretical, but maybe You find something of interest.

Best Regards
Ralf

planet10 · 25th February 2010, 08:08 PM

Thanx for that Ralf.

dave

Ralf Biermann · 26th February 2010, 06:23 PM

Hi Dave,

You are welcome.

Best Regards
Ralf

leitmo · 26th February 2010, 09:42 PM

great info! thanks!

Cassiel · 26th February 2010, 10:54 PM

About your Smart 10 guitar amp:

Quote:

The schematic stems from the tube expert Larry Grohmann.

The schematic stems from the tube expert Leo Fender. It's a Fender Champ with a 6l6.

Ralf Biermann · 27th February 2010, 06:52 AM

Hi Stalker,

I just took a look at the schematic of the Fender Champ Model 5E1, which I found in the Tube Amp Book from Aspen Pittman.

Indeed there are many similarities, the only differences are in the supply line, because the Fender Amp has an additional choke, which might be better. The missing choke in the Smart-10 is probably due to cost reduction reasons, however I think it is not needed, when there is no audible hum.

On the other hand the circuitry has the tubes in basic configurations, I am not sure where copying starts exactly. If the Smart-10 is just a copy, then it is not a good copy, because it uses a higher supply voltage, so the bias of all tubes is different.
After all the Smart-10 can't be beaten in the price, and the sound is ok.

Best Regards
Ralf

25th February 2010, 07:27 PM	#1
Ralf Biermann diyAudio Member Join Date: Oct 2006 Location: Countryside	Tube Schematics Hello All, I have added some info about tube schematics on my homepage. Electronics Some things are just theoretical, but maybe You find something of interest. Best Regards Ralf

25th February 2010, 08:08 PM	#2
planet10 frugal-phile(tm) diyAudio Moderator Join Date: Oct 2001 Location: Victoria, BC, NA, Sol III Blog Entries: 4	Thanx for that Ralf. dave __________________ community sites t-linespeakers.org, frugal-horn.com ........ commercial site planet10-HiFi p10-hifi forum here at diyA

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26th February 2010, 06:23 PM	#3
Ralf Biermann diyAudio Member Join Date: Oct 2006 Location: Countryside	Hi Dave, You are welcome. Best Regards Ralf

26th February 2010, 09:42 PM	#4
leitmo diyAudio Member Join Date: Apr 2007	great info! thanks!

27th February 2010, 06:52 AM	#6
Ralf Biermann diyAudio Member Join Date: Oct 2006 Location: Countryside	Hi Stalker, I just took a look at the schematic of the Fender Champ Model 5E1, which I found in the Tube Amp Book from Aspen Pittman. Indeed there are many similarities, the only differences are in the supply line, because the Fender Amp has an additional choke, which might be better. The missing choke in the Smart-10 is probably due to cost reduction reasons, however I think it is not needed, when there is no audible hum. On the other hand the circuitry has the tubes in basic configurations, I am not sure where copying starts exactly. If the Smart-10 is just a copy, then it is not a good copy, because it uses a higher supply voltage, so the bias of all tubes is different. After all the Smart-10 can't be beaten in the price, and the sound is ok. Best Regards Ralf

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