NBD - 6g15

sonar

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A fun and quick end of summer project.



Mostly sourced parts (partial tag board/electronics kit to save a few bucks), so assuming I missed something.

Cabinet from the wonderfully talented John Mergili.

www.mergili.com
 

mmd

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cool. enjoy!!! there is NOTHING better for reverb than a spring tank. i LOVE mine.
 

Soul Tramp

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Great project and a great amp add-on! Have fun!
 

sonar

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Thank you gentlemen!

A little work today.

 

sonar

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The quick end of summer project had to go on hold...


for 4 months.

Today I was finally able to get some work done since my last post.



Finished populating the main tag board and mounted everything for wiring. I decided to forgo the doghouse and mount the big electrolytics in the chassis. Took a bit of creative "adjustments" since the PT and choke are mounted opposite the big caps.

Tomorrow if I get a couple hours I plan on wiring the tubes, reverb in/out, foot pedal jack and grounding.
 

sonar

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I chose the tolex to match my Bassman combo I put together this summer.


 

sonar

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It was a New Vintage Amp Day thread. The Bassman (AB165) was a garage sale score that had been modified to a Marshall type thing.

http://www.mylespaul.com/forums/showthread.php?t=368613

I restored it back to original specs, minus the tone choking plate NFB found on this model Bassman. I kept the adjustable bias mod (identical to other Fender Class A/B bias adjusts of the era) instead of the other dumb idea CBS engineers used on the AB165 - a hum bias adjustment. I also retubed with NOS pre's and the Tung Sol 7591A, which is like a 6L6 on steroids.

Turned out great! In this form I prefer the AB165 over Marshall JTM50's. More body with lots of punch.



I had the 15" combo cab made (not a great build, but does the job) and already had an Eminence 1518 speaker from another amp project I never got around to doing.
 

jwinger

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Mine was a bit temperamental at first but now it's running smoothly and I never turn it off!
 

sonar

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Yes, I'm really looking forward to using an outboard reverb unit. Pedals only go so far.
 

sonar

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Wiring done. Now for a trace through and troubleshoot.
 

sonar

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Powers up with the pilot light, fuse holds and...

no guitar signal. Tracing through the wiring with nothing obvious. Shot off an email to Don for some words of wisdom.

Charted out my voltages - V2, pin 1 is low and pin 8 isn't reading anything.

And so the troubleshoot starts.

Any suggestions?
 

sonar

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Oh yes, the chopstick has gotten heavy use. I've also touched up any soldering that looked suspicious.
 




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