I searched the archives, and didn't find much, so it's time to revisit!
Simple line out for tube amp. No speaker emulation needed. Just a pot to control level, one resistor, one cap. Even with these three components, I found a handful of variations. Non-polar cap inline with signal, cap parallel across output, no cap at all. Different values of resistors and pots.
What's your favorite?
This is for an SE KT88 low-watt bass amp, which will output via this line out to a 1000-watt solid state power amp.
Simple line out
Moderators: pompeiisneaks, Colossal
Simple line out
I build and repair tube amps. http://amps.monkeymatic.com
Re: Simple line out
Take a look at "Kalamazoo amp field Guide". Look under the Mods tab.
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Reeltarded
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Re: Simple line out
Damn! Martin is going to kill me for not rebroadcasting his instructions that I drew up and lost.
Let me see if I can find the thread. So hard to search complete terms.. eeee...
Hey!! Zish!
https://tubeamparchive.com/viewtopic.ph ... 8743fc3569
Look at Martin excoriating me. Tsk! I never hear. I swear I do listen.
Let me see if I can find the thread. So hard to search complete terms.. eeee...
Hey!! Zish!
https://tubeamparchive.com/viewtopic.ph ... 8743fc3569
Look at Martin excoriating me. Tsk! I never hear. I swear I do listen.
Signatures have a 255 character limit that I could abuse, but I am not Cecil B. DeMille.
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martin manning
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Re: Simple line out
I'd have been hard pressed to dig that up, so thanks, Miles! I think a simple divider would be good, use the shunt cap to dump HF and noise to ground. Let the little amp use its speaker for a load, and adjust the values to get the right output signal level for the power amp input.
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Reeltarded
- Posts: 10189
- Joined: Sat Feb 14, 2009 4:38 am
- Location: GA USA
Re: Simple line out
You say somethin?
Signatures have a 255 character limit that I could abuse, but I am not Cecil B. DeMille.
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Reeltarded
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- Joined: Sat Feb 14, 2009 4:38 am
- Location: GA USA
Re: Simple line out
hahaha oops I didn't mean to laugh. 
Martin, use google and search with *terms*+ site:ampgarage.com.
I used "reeltarded variable line out site:ampgarage.com".
Martin, use google and search with *terms*+ site:ampgarage.com.
I used "reeltarded variable line out site:ampgarage.com".
Signatures have a 255 character limit that I could abuse, but I am not Cecil B. DeMille.
Re: Simple line out
This has always worked for me. Simple but effective.
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martin manning
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Re: Simple line out
The series cap is a good idea if there is a GNFB loop. Otherwise, there will be DC on the line-out signal.
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martin manning
- Posts: 14308
- Joined: Sun Jul 06, 2008 12:43 am
- Location: 39°06' N 84°30' W
Re: Simple line out
Cool, I'll try that next time I want to rummage through the pile!Reeltarded wrote:hahaha oops I didn't mean to laugh.
Martin, use google and search with *terms*+ site:ampgarage.com.
I used "reeltarded variable line out site:ampgarage.com".
Re: Simple line out
Great tip. Thanks, Martin!martin manning wrote:The series cap is a good idea if there is a GNFB loop. Otherwise, there will be DC on the line-out signal.
I build and repair tube amps. http://amps.monkeymatic.com
Re: Simple line out
Here is some info I have.
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Re: Simple line out
thanks Mark.
Much appreciated the "adding_slave_out_to_amp" article. Cool graphics too.
Much appreciated the "adding_slave_out_to_amp" article. Cool graphics too.
Last edited by overtone on Thu Jul 11, 2013 4:28 am, edited 1 time in total.