Recent Posts

61

Introduce Yourself / Re: Introduction

« Last post by EL34 on January 21, 2026, 10:09:33 am »

Hi, go to the main amp forum in the link above to post your questions

62

Introduce Yourself / Introduction

« Last post by EL34 on January 21, 2026, 10:05:12 am »

Welcome to the Hoffman Amps forum

There are many different boards on this forum for different topics.

The Tube Amp Building - Tweaks - Repairs board is where you can post amp questions.

That board is listed here.
https://el34world.com/Forum/index.php?board=13.0

Thanks,
Doug Hoffman

63

Introduce Yourself / Introduction

« Last post by ALK2MT on January 21, 2026, 10:05:12 am »

Good morning. I’ve spent the last 10 years building effects pedals and recently started working on amps.
I am currently building an Ampeg R12RB from scratch and pieces I acquired at an estate sale as well as a Hoffman Blues Jr. PTP build.

Happy to be in this group of knowledge.

Right off the bat, I do have a question about connecting the solid state reverb circuit back into the Blues Jr circuit. I am wanting some expertise on modding the circuit. Could I just attach the reverb circuit back in on either side of R18 like the original circuit? How do I delete meat control as well. 

Thank you!

Alex

64

Tube Amp Building - Tweaks - Repairs / Re: Fender 6G8 hum

« Last post by uki on January 21, 2026, 09:06:25 am »

What about the filter caps on the pre amp side?  You shouldn't have to lift one end unless you get low readings, there should be no other paths to ground.

Ok got new readings w/o disconnecting the caps.

6m ohms for the power section
16m ohms for the preamp section

Did play a bit with amp to hear what is going on,
amp start with low noise level, the noise increase as the amp warm up,
did play for about 20 minutes.

Thanks

65

Guitars / Re: Guitar intonation

« Last post by jjasilli on January 20, 2026, 08:10:35 pm »

I too tend to be a mother plucker.  But the guitar tone really blooms, and sustain is improved, with a soft touch and the amp turned up. 


Takes a bit of patience to watch all the way through, but here's some synchronicity:

66

Tube Amp Building - Tweaks - Repairs / Re: Favorite 6AQ5 SE and PP power sections?

« Last post by kagliostro on January 20, 2026, 01:24:22 pm »

Seems that the Fender Musicmaster 6AQ5 wasn't listed

Here the schematic and some info from Tubestore

https://www.thetubestore.com/fender-musicmaster-6aq5-schematic

Franco

67

Tube Amp Building - Tweaks - Repairs / Re: Fender 6G8 hum

« Last post by AlNewman on January 20, 2026, 12:47:24 pm »

What about the filter caps on the pre amp side?  You shouldn't have to lift one end unless you get low readings, there should be no other paths to ground. 

68

Other Topics / Re: Anybody watching Gold?

« Last post by EL34 on January 20, 2026, 11:54:37 am »

Gareth's new Gold and Silver info

69

Tube Amp Building - Tweaks - Repairs / Re: Where to ground the first filter cap?

« Last post by wsscott on January 20, 2026, 11:35:27 am »

Thanks.  I wired them like 14.14b.  It's just that a couple of the leads from the components to where I could put one of the star grounds are pretty long, and I didn't know if that was factor to consider.

I understand the concept that a short lead isn't really short if it still has to go a long way on the buss to get to the filter cap lead.

70

Other Topics / Re: Anybody watching Gold?

« Last post by shooter on January 20, 2026, 11:02:35 am »

at Walmart I like socks and salad dressing.

 
once I took the bullet school classes for my CPL, I took the instructors advice and AVOID ANY place that would "test my patience"


haven't been in wally-land for 3 years 

New Banking RuleLooks

both my financial places sent new TOS docs, reading through the legal gobbly-gook, the financial places pretty much "own" n "control" my assets.   there are steps to "appeal" pretty sure that process would deplete my assets n yield limited results