The Amp Garage

Thanks guys!!! Had quite a scare. Chest X-ray showed massively enlarged heard consistant with congestive heart failure. So I went to emergency room. Turns out it was not the heart enlarged but the sac (pericardium) that surrounds the heart. Filled with fluid. Pericarditis. This typically is a viral ...

Why not just use radials? Tons of 300s and 330s available. And Dumble used them too. 183 has radials and not axials!!! Reinventing the wheel here...... On another note, you guys should know that Dumble had measured and marked the capacitance of the mains on 183 and they were 297 and not 330. 300mf i...

Another note.... It looks like there are several deviations from the "Dumble" specs. Snubbers, feedback, etc.

Maybe for 800.

Nice!!

Someone likes the recipe!!

Btw, I found on some 50 watters that a little more power amp nfb makes a difference. Maybe try a 4.3K or 3.9K feedback resistor and report back.

Can't comment on what Gil has seen. I have a friend in Canada with a low plate amp. He measured the trimmer and it was over 50K from ground. Untouched since Dumble set it..... Also, my friends high voltage Music Man amp with low plates had the trimmer set about halfway in the pics. Guys, the 100K lo...

Guys, the 100K low plate amps, in some of the real ones I have seen/heard of, have the trimmers set at about 2X the setting of the high plates. Remember, the low plates have less gain.....

I do not have a #124 build. I do have a boatload of other non HRM builds. None have the 346K trimmer, but the 220K into 100K trimmer. They soudn and feel spectacular! So, 346K may be nice, but nothing worng with 100K either! Just make sure to set it well.... I like 25-26K from ground with high plates.

Hi Todd, I am the mod here. I have not heard any talk of expelling people. As long as this thread stays friendly, it is OK. If theres a a moderator here it would be a good idea to just delete this thread and the one about ceriatone. (obviously this is a continuation of that one) It is a never ending...

I feel you Bill.

There are a few people here that insist on insulting other members. Most of whom are serious contributors and have give the shirts off of their backs.

Makes no sense to kill the goose that laid the golden egg.

Guys, the bass pot is not a big deal. It is a variable resistor. The actual value is not that important. Really.....

I was saying to try the 2 EL34 tubes. Try a 3.3 or 3.9 resistor. It totally worked on my 50 with the 183 circuit! Hi Scott and Ampdork, thanks for the info. I have the NFBL as a switch on the amp, so I can choose between 22M, 44M and non. For cleans I really like no NFBL. With the Strat the OD is be...

Interesting.... I find this circuit to be nicer with the EL34. I have a 50 watt amp that I tried it with. I wound up modifying the NFB on it. Try more power amp feedback to tighten the bottom. With the 2 EL34s installed. Maybe start with the 4.7K on the 8 ohm tap. I liked a 5.1K on the 8 ohm on the ...

I have two amps with variations of the 183 circuit. Neither of them has any of the traits you describe. As such, I'd suggest two things. Tubes Speaker I run my 2X12 G1265 cab and it is really sweet with this circuit. Also, tubes matter. Currently I like the old brown base Tesla EL34 in there. Preamp...

That's it. Make sure they are strong. I'd say 2200 or more on that Hickock 600/6000. Look's like Lori (Greengirl) is the seller? Looks like her type of photo. She is reputable.

David Root wrote:Scott, is this the right one? Kinda looks like it.

The Emerald Pro had the 100K slope and .047uf midcap. That helps the non boosted tone A LOT. Cleans out the woof. What secret? I did not hear anything in that clip special. Any good HRM build would get you there IMO. Thanks for your help guys! Hmm - 33k Slope same value as HRM in Bluesmaster and the...