Search results

  1. J

    Testing Hammond 125B ot

    Hello All, I am building a Rob Robinette inspired 6G3 Deluxe Micro amp. I did a mashup of a 6G3 preamp and Rob's 5F6a bassman micro power section. I am getting no sound from the amp. All the voltages look normal, and I can post them if needed. Double and triple checked my input and speaker out...
  2. J

    6G3 Deluxe Micro Preliminary Schematic

    Hi Everyone, I am really liking my recent Brown Deluxe/ Brown Super build. I have a boatload of 12AU7 Tubes, so I thought I would build a 6G3 Deluxe Micro amp using Rob Robinette's 5F6a Bassman Micro for the power amp. I am hoping to get drive and distortion at lower volumes. Posted below is...
  3. J

    Gain Stage Topology

    Hi Everyone, I am looking for advice on my project. I am pretty new to building amps and this is my first effort at modifying a design. I am in process of building a hybrid amp with a Brown Deluxe channel and a Brown Super channel. The Brown Super has an unused triode, so my idea was to use...
  4. J

    6V6 Brown Super Build

    Hello Everyone, Here is my latest covid project. I am building a 6G4A Brown Super with a 6V6 power section and the normal channel modified into a 6G3 Deluxe bright channel. I arrived at this mashup due to parts I have from a salvaged Hammond S6 chord organ which is 6V6 push pull with a 4ohm...
  5. J

    Planning Stages 6V6 6G4a Super

    Hi Everyone, I am planning my next project. This will be my 5th tube amp build and my most ambitious to date. I am hoping to plan this one with all of the collective knowledge here. I am trying to become more knowledgeable about design etc., and only order parts one time, ha ha. I want to...
  6. J

    5G9 Tremolux Finally Finished

    HI Everyone, Thought I would post a couple of pics of my 5G9 build. This amp was a long time coming, and was not easy. This was my first build without a Kit and I made some mistakes. I built it originally in a chassis for a VHT amp I got really cheap, but I didn't like the form factor and...
  7. J

    5G9 Trouble Shooting

    Hello I am having some issues with my homebrew 5G9 Tremolux. Background - I built this amp and it worked fine but it was a little noisy and I didn't like the chassis I had it in, so I redid it in a Hammond aluminum chassis. This is built as a head unit with a Classic Tone multi tap OT and a...
  8. J

    Hammond Salvage to 5E3

    Hi Everyone, Thought I would share my latest project. This is a Hammond S6 organ salvage. I tried to do this as cheap as possible using as much of the donor organ as possible. I probably have less than $100 total in the project. This was a beat up organ I got for $20. It has a huge PT...
  9. J

    5F2A Head Cabinet

    Hello Everyone, hope you are all doing OK. I've had this project in mind for quite some time and now have time so I finally got it finished. I did a Cherry wood cabinet for my princeton, with a tru oil finish. Next up is a small speaker cab and a cab for a 5G9 head that I just redid in a new...
  10. J

    5G9 Biasing

    Hello This is an update on my 5G9 build. I cleaned up my wiring and it sounds good, very low noise, all of the voltages are very close to the schematic. The issue now is getting the amp biased. My OT center tap is at 379 volts, and my tube plates are 371 and 370 volts, the resistance between...
  11. J

    Organ Scavenge

    I scored a $20 Hammond S6 chord organ that was not operative, so I am scavenging parts from it. I got 2 RCA 6v6, 2 12ax7, a big bottler 5U4, a huge PT and looks like two OT's, and two Rola 10" alnico speakers. I think there are 18 12au7 tubes also, plus all of the bumble bee resistors, and 9...
  12. J

    Practice speakers for 5G9 Tremolux

    Hello Everyone, I just finished my 5G9 build and I would like to incorporate speakers into a small cab for quieter home playing, similar to what Rob Robinette did with a 6" speaker in his bassman. I will be building my own cab. I have a 20" wide chassis so I have the ability to do two 6" or...
  13. J

    5G9 Tremolux Trouble Shooting

    Hi Everyone, I have a loud buzz that I can not track down in a homebrew 5G9 build. The amp works fine except for the buzz. I can play my guitar through it and get normal sounds. The volume and tone controls change the buzz, gets louder with the volume up and the tone control changes the...
  14. J

    5G9 Tremolux with 2 inputs

    Hello I have been thinking of building a 5G9 Tweed Tremolux. The original design has 4 inputs that use one 12AY7. Two guitar and two microphone. My idea was to use only the 2 guitar inputs in the first half of V1 and use the second half of V1 as an extra gain stage with a volume pot. Am I...
  15. J

    Quilter 101 Sighting

    Saw Tommy Harkenrider and the Memphis Kings backing Si Cranstoun at the Doheny Blues Festival. He was using the 101 mini with a small pedal board. I couldn't see the exact setup, but there was a backline Deluxe Reverb Reissue that he was using as a cab miced up. I think he just plugged the...
  16. J

    Do I have a bad OT

    Hi Everyone, I just went through the Ruby start up procedure on a Boothill 5F2A, using a Classic Tone 40-18031 OT, 4, 8 and 16 ohm out. Everything checked out until I hooked up a speaker and put the power and preamp tubes in. I got a high pitched squeal no matter the volume level and the...
  17. J

    Boothill 5f6 a success

    Hello, I thought I would introduce myself and give props to Dave at Boothill amps, and say thanks to all the posters in this forum. I just finished up my first build and it turned out pretty good. After reading this forum I got GAS to build an amp, I wanted something with more headroom than...
  18. J

    Boothill 5f6a Bias Question

    Hello, I am a long time lurker but this is my first post. I recently completed my first build a Boothill 5f6a with fixed bias. David was great to work with and the kit was great. That amp started right up using the Ruby start up guide and it sounds great, very quiet. I have 438V at V4 and...




Top