Search found 99 matches

by fp2000
Sat May 22, 2010 7:56 pm
Forum: Dumble Discussion
Topic: Replacing shielded coax with single conductor question
Replies: 7
Views: 709

Re: Replacing shielded coax with single conductor question

What is the concensus on the preferred type of coax to be use? I am using RG-174. Does anyone know the capacitance?
by fp2000
Fri Apr 16, 2010 3:39 pm
Forum: Dumble Discussion
Topic: Dimenson Dumble masterboard, eyelet board size
Replies: 47
Views: 14339

Re: Dimenson Dumble masterboard, eyelet board size

Turretboards.com also offers garolite in several colors.
by fp2000
Fri Mar 12, 2010 9:59 pm
Forum: Dumble Discussion
Topic: PT Minimum current rating for a 4 6L6 build
Replies: 2
Views: 437

Re: PT Minimum current rating for a 4 6L6 build

Thanks Gil. I will go from the assumption that you made. I guess I should have asked the real question, is if 300 mA would be enough since that I the transformer that I have in hand. That would give me about 130watts.
Thanks
by fp2000
Fri Mar 12, 2010 9:16 pm
Forum: Dumble Discussion
Topic: PT Minimum current rating for a 4 6L6 build
Replies: 2
Views: 437

PT Minimum current rating for a 4 6L6 build

Can someone tell me what the minimum current rating for a PT is when you are using 4 6L6 power tubes? I know that a Twin PT is rated for about 450mA. But is that really the minimum needed for a 88 watt build?
Please let me know
Thanks all

Frank
by fp2000
Mon Jan 18, 2010 3:48 pm
Forum: Dumble Discussion
Topic: New 70's style build up and running. (Thanks!!)
Replies: 45
Views: 7811

Re: New 70's style build up and running. (Thanks!!)

Marcos, you mentioned earlier about how great the FET circuit works on this amp. What is so special about it? Is it the same FET circuit found on the other amps? Please let me know your findings. I was about to try different fets but did not know where to start. Thanks, great looking amp. Clips woul...
by fp2000
Thu Nov 19, 2009 3:36 pm
Forum: Dumble Discussion
Topic: Ordered a BlueMonkey in March 09 - Still didn't get it
Replies: 44
Views: 6629

Re: Ordered a BlueMonkey in March 09 - Still didn't get it

March through November is about 9 months, that beats HAD a long way.
I guess the wait must be part of the tone as well, where the real magic is.... :D
by fp2000
Tue Sep 08, 2009 2:40 pm
Forum: Dumble Discussion
Topic: ADD REVERB IN #124 SCHEMATIC
Replies: 4
Views: 814

Re: ADD REVERB IN #124 SCHEMATIC

You are correct Bob. Thanks for making the correction. I did end up with 220K, with a short tank, 3 springs. However, for me 220k is more than I need.
Thanks
Frank
by fp2000
Mon Sep 07, 2009 2:07 am
Forum: Dumble Discussion
Topic: ADD REVERB IN #124 SCHEMATIC
Replies: 4
Views: 814

Re: ADD REVERB IN #124 SCHEMATIC

For R10 start with a value between 47K and 27K. You have to calculate the power dissipation on the tube so you won't fry it with the higher voltage. Just keep that in mind. I put mine just after the master and before the PI. It works great. You can also experiment with the mix resistor, I believe th...
by fp2000
Wed Sep 02, 2009 11:14 pm
Forum: Dumble Discussion
Topic: BM/HRM soundcheck
Replies: 25
Views: 2731

Re: BM/HRM soundcheck

I hear some noise, likely to be computer noise maybe. But, in your room, is the amp quiet? How do you like those Hammond transformers? I've heared mixed opinions on them, and would like to hear from someone who's actually built an amp with them. Please let me know as I was contemplating buying a pai...
by fp2000
Sat Aug 15, 2009 9:40 pm
Forum: Dumble Discussion
Topic: Woo hoo! Kleinulator!!!
Replies: 7
Views: 1627

Re: Woo hoo! Kleinulator!!!

Did you use orange 6ps or did you use something else for coupling caps?
by fp2000
Wed Aug 12, 2009 8:03 pm
Forum: Dumble Discussion
Topic: Woo hoo! Kleinulator!!!
Replies: 7
Views: 1627

Re: Woo hoo! Kleinulator!!!

what kind of coupling capacitors did you use on your kleinulator build?
by fp2000
Thu Jul 30, 2009 6:18 pm
Forum: Dumble Discussion
Topic: HAD is alive and well and policing ebay....
Replies: 58
Views: 9117

Re: HAD is alive and well and policing ebay....

Actually, we could sell clones and advertised them as: "This is NOT a Dumble amp, but actually a better product than the real deal for much less money".
Would that be accurate?
by fp2000
Tue Jul 28, 2009 10:16 pm
Forum: Dumble Discussion
Topic: d-lite vs d-umble
Replies: 16
Views: 2602

Re: d-lite vs d-umble

Structo, when you talk about the "few tweaks", are those the ones mentioned in the "tweaked" d-lite schematic that is running around?
I know it sounds obvious but wanted to make sure you were talking about the same thing.
Thanks

Frank
by fp2000
Fri Jul 24, 2009 10:01 pm
Forum: Dumble Discussion
Topic: Bias Adjustment
Replies: 7
Views: 962

Re: Bias Adjustment

I used a 10K tail resistor and it worked better for me. I use 6v6 and 6l6, I get a better range to work with.
by fp2000
Fri Jul 24, 2009 9:57 pm
Forum: Dumble Discussion
Topic: Newbie wiring questions
Replies: 15
Views: 1405

Re: Newbie wiring questions

I've used teflon single core 20 gauge all aroung and worked fine. No noise issues or anything, but like it was indicated before, make sure you get a very good quality wire stripper... mine kept holding the insulation too tight sometimes and it ended up thinning out a portion of the insulation that i...