Hoffman Amplifiers Tube Amplifier Forum
Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: Toxophilite on November 08, 2019, 01:08:35 am
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My friend has this Bogen DB110 that he's had for a bit. I said I'd make it more usable for guitar for him.
He wants to invest minimal $$ and I want to not do a complete rebuild if possible.
2 6V6s in pushpull 5Y3 rectifier, 3 12ax7s, half of one is the cathodyne phase inverter
So, many stages left over. It has a two band EQ.
My thoughts were to add a proper guitar input and maybe tweak the EQ. Maybe use a triode for a tremelo
The placement of the volume control is interesting.
DoeS the PA and inverter look usable as is?
And any ideas towards the easiest and cheapest way towards a decent sounding guitar amp?
i guess there's some similarities to a princeton PA in format.
Sorry about the schematic. The entire service manual is too big I was trying to take a screenshot. Now I need to figure out how to adjust the screenshot quality.
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I've done 3 of these. I gutted the chassis and added terminal strips.
One is the Bassman Jr. I did this amp maybe 10-12 yrs ago? It was back when you could pick one of these up off ebay for about $40.
With respect, Tubenit
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Another one of the ones I did was the Carolina Blues Special. Still one of my favorite amp designs! I did two like this.
Once again gutted the amp chassis and used terminal strips inside.
Sort of a 5E3-ish with a one tube reverb and a James/Baxandall tone stack. Very fun amp to play!
This schematic is a "revised" improved version of the original one I did in the DB-110. However, you can leave the PPIMV off and also just use a 1M resistor to ground instead of a dwell pot.
With respect, Tubenit
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IF you don't want to bury your dykes into her completely...
suggestions attached. cap values are personal preference - YMMV.
--pete
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Hey thanks. Lot's of good ideas here!