Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: Legless Bluesman on May 20, 2021, 05:09:25 pm

Title: What is this
Post by: Legless Bluesman on May 20, 2021, 05:09:25 pm: Hi there, I'm brand new to the forum. I'm just starting out in the amp builders world and I came upon this nicely built unit. But I'm not sure what it is so I thought I would ask the experts. Thank you
Title: Re: What is this
Post by: sluckey on May 20, 2021, 06:57:47 pm: Looks like a homemade rack unit for who knows what.
Title: Re: What is this
Post by: Legless Bluesman on May 20, 2021, 09:05:18 pm: It has 7 pin preamp tube sockets. I hooked a hammond ao-14 power and output transformer to it the tubes warmed up the light in front came on but no noise not even a nasty dog killing squeal.
Title: Re: What is this
Post by: Legless Bluesman on May 20, 2021, 09:09:51 pm: I'd like to turn it into something simple like a early fender design while retaining the nice craftsmanship.
Title: Re: What is this
Post by: shooter on May 21, 2021, 05:33:58 am: it's well laid out, so start sketching a schematic, without that, the PT and OT data, it's sorta just a wall hanger
Title: Re: What is this
Post by: Legless Bluesman on May 21, 2021, 07:00:21 pm: How do I start a schematic. I tried to figure out where everything is going with a continuity test but once the signal goes into the buttplug circuit board I lose track of where everything goes. Is there any information on the web about building up schematic? Thanks for your help.
Title: Re: What is this
Post by: sluckey on May 21, 2021, 07:14:00 pm: Quote from: Legless Bluesman on May 20, 2021, 09:05:18 pm
It has 7 pin preamp tube sockets. I hooked a hammond ao-14 power and output transformer to it the tubes warmed up the light in front came on but no noise not even a nasty dog killing squeal.
Please tell us what you connected those transformers to. Be specific.