Recent Posts

71

Tube Amp Building - Tweaks - Repairs / Re: HIGH Voltage right off the PT

« Last post by dickjonesify on March 08, 2026, 09:57:36 am »

The Buckaroo is performing great, FYI. Still working on this amp but the numbers are better.

72

Tube Amp Building - Tweaks - Repairs / Re: Why did Marshall use the EL34 vs. the 6L6?

« Last post by kagliostro on March 08, 2026, 08:50:24 am »

Just curious, which thread should it be in?

May be here ??

https://el34world.com/Forum/index.php?topic=33385.0

Franco

73

Tube Amp Building - Tweaks - Repairs / Re: Why did Marshall use the EL34 vs. the 6L6?

« Last post by dogburn on March 07, 2026, 11:17:42 pm »

Yep, from what I've learned, Marshall copied the Fender 5f6a Bassman circuit but substituted the EL34 that was more affordable/available in England at the time. Funny how the vagaries of politics and economics of the postwar/cold war era, led to the development of different sound of amp.

74

Tube Amp Building - Tweaks - Repairs / Re: Why did Marshall use the EL34 vs. the 6L6?

« Last post by glass54 on March 07, 2026, 09:14:58 pm »

Just to add to Merlin's comment, (as I have read in the past) 6L6 vacuum tubes (and their 5881 equivalents) were difficult to come by in the UK (in the 1960's) and were relatively expensive, as US-made valves were subject to import restrictions or higher duties.
The local EL34 and EL37 were readily available and for a more rugged tube GEC KT66. These were a more cost effective tube.
I suppose that all changed by 1990's as Marshall Twin Power amps (9100/9200 Dual MonoBlocks) became available with EL34s or 6L6GC/GT.
Regards
Mirek

75

Tube Amp Building - Tweaks - Repairs / Re: Why did Marshall use the EL34 vs. the 6L6?

« Last post by sluckey on March 07, 2026, 07:04:09 pm »

Cos I'm a blow-hard LoL, ... and I don't know how this jumped threads

Just curious, which thread should it be in?

76

Tube Amp Building - Tweaks - Repairs / Re: Why did Marshall use the EL34 vs. the 6L6?

« Last post by tubeswell on March 07, 2026, 06:47:01 pm »

its sluckey, not Sluckey

Huh???  I answer to either, but why is this posted in this thread?

Cos I'm a blow-hard LoL, ... and I don't know how this jumped threads

77

Tube Amp Building - Tweaks - Repairs / Re: Why did Marshall use the EL34 vs. the 6L6?

« Last post by sluckey on March 07, 2026, 06:43:05 pm »

its sluckey, not Sluckey

Huh???  I answer to either, but why is this posted in this thread?

78

Tube Amp Building - Tweaks - Repairs / Re: Why did Marshall use the EL34 vs. the 6L6?

« Last post by tubeswell on March 07, 2026, 06:37:09 pm »

its sluckey, not Sluckey

79

Tube Amp Building - Tweaks - Repairs / Re: Peavey Classic 30 - Update

« Last post by bbmade on March 07, 2026, 06:11:00 pm »

I believe it.  The store agreed to pay me to try and fix it.  I’m certain I’ll have more time than compensation but, I’m stubborn so it’s at least half my fault.

Not that it helps at all, but I learned a long time ago that these folded circuit board Peaveys are a time sink and not worth repairing. They aren't made to be serviced at all.  I won't work on them in my shop.
Good luck!

80

Tube Amp Building - Tweaks - Repairs / Re: Mixing Resistors

« Last post by dickjonesify on March 07, 2026, 03:20:55 pm »

So, next question: if I input each of my channels separately into the two grids of an LTP phase inverter, do I need mixing resistors?

No mixing resistors are needed because the mixing takes place inside the LTP PI tube.

Awesome! Makes sense. I think I’ll go this route.