Search found 67 matches

by mobisimo
Thu Feb 21, 2013 1:14 pm
Forum: Dumble Discussion
Topic: Low Plate Skyliner, High Voltage....In Progress
Replies: 31
Views: 6336

Re: Low Plate Skyliner, High Voltage....In Progress

Looking forward to it! TM, your builds are always exemplary.
by mobisimo
Sat Dec 08, 2012 8:37 am
Forum: Dumble Discussion
Topic: Strat/Dumble. Always a problem for me until today!
Replies: 94
Views: 15196

Re: Strat/Dumble. Always a problem for me until today!

groovtubin wrote:I do my own thing w/these amps, not exactly like dumble.
Hey Jim,

Would you be able to elaborate on your tweaks, especially to make it bloom and sing with a Strat?

Regards,
Mo
by mobisimo
Fri Nov 16, 2012 8:05 am
Forum: Dumble Discussion
Topic: Fuchs ODS too spiky on the treble side
Replies: 30
Views: 5639

Re: Fuchs ODS too spiky on the treble side

I love my Fuchs Bassman ODS100!

Edit: Andy also promptly responded to a question I had asked him about the amp. Can't beat that. Thanks, Andy.
by mobisimo
Mon Oct 29, 2012 9:05 pm
Forum: Garage Talk
Topic: Lost another friend...
Replies: 12
Views: 1692

Re: Lost another friend...

I'm very sorry for your loss, Lefty.
by mobisimo
Mon Oct 29, 2012 7:53 pm
Forum: Garage Talk
Topic: RIP Lady
Replies: 26
Views: 4348

Re: RIP Lady

I'm very sorry for your loss, Tom. I was going to post this in full but couldn't get through it with dry eyes, so here is the link: http://www.webcircle.com/dogs/eulogy.html I hope it helps.
by mobisimo
Mon Oct 29, 2012 7:53 am
Forum: Dumble Discussion
Topic: New ReleaSSSes
Replies: 249
Views: 52325

Re: New ReleaSSSes

Thanks all for the quality content and discussion! This thread is a real treat and the featured amps sound great. A quick question: can anyone see a reason why it wouldn't be possible to develop the appropriate bias for the dc follower using 80s twin iron, which uses a bridge rectifier, simply by ad...
by mobisimo
Sun Sep 23, 2012 3:44 am
Forum: Trainwreck Discussion
Topic: The Mods thread.
Replies: 17
Views: 5153

Re: The Mods thread.

Hi Mark, thanks for your reply. I'll try it out in a wreck type build and report back.
by mobisimo
Sat Sep 22, 2012 7:22 pm
Forum: Trainwreck Discussion
Topic: The Mods thread.
Replies: 17
Views: 5153

Re: The Mods thread.

Mark wrote:I also found there was a significant difference using 250K pots in the tone stack (per the Komet) than the Express' 1 Meg pots.
Hi Mark, I'm curious about this and wonder if you would mind elaborating a bit.

Many thanks,
Mo
by mobisimo
Mon Jul 09, 2012 12:37 am
Forum: Trainwreck Discussion
Topic: Just in case you don't think careful building matters...
Replies: 7
Views: 2479

Re: Just in case you don't think careful building matters...

If it's not too much trouble, Prspastor, would you be able to post some pics of these amps? The lead dress on my first amp--an 18 watt---was pretty goofy. It had a pretty brown sound and was light on gain. After I cleaned it up it got very bright and gainy. The coupling caps were 715P because Mallor...
by mobisimo
Sun Apr 15, 2012 10:05 pm
Forum: Dumble Discussion
Topic: New ReleaSSSes
Replies: 249
Views: 52325

Re: New ReleaSSSes

Thank you for this amazing work. The preamp schematic resembles ODSR #13 quite a bit: http://ampgarage.com/forum/files/odreverb_902.pdf Of course there is much more feedback here, along with the two tube mixer setup. One question: on V4a+b cathodes, usually the R/bypass C combination is elevated by ...
by mobisimo
Fri Mar 09, 2012 10:24 am
Forum: Technical Discussion
Topic: Preamp gain stages: how they sound and why
Replies: 70
Views: 162204

Re: Preamp gain stages: how they sound and why

Very cool! Thanks for posting these.
by mobisimo
Wed Feb 01, 2012 1:30 am
Forum: Dumble Discussion
Topic: #124 NFB Resistor
Replies: 17
Views: 3877

Re: #124 NFB Resistor

I've read a recommendation that in the (sensitive) grid stopper position a resistor with little inductance is important. I employed the "hifi" trick of testing resistors with a magnet and while the metal films and carbon comps didn't stick, the carbon films did. I'll be ordering both carbon films an...
by mobisimo
Sun Apr 24, 2011 10:54 pm
Forum: Dumble Files
Topic: Steel String Singer Layout?
Replies: 55
Views: 38689

Re: Steel String Singer Layout?

double post
by mobisimo
Sun Apr 24, 2011 10:54 pm
Forum: Dumble Files
Topic: Steel String Singer Layout?
Replies: 55
Views: 38689

Re: Steel String Singer Layout?

Some gut shots of the sterling made their way on here a while back--from ebay if i'm not mistaken--and it's tough to tell what's going on with the filters. Folks have said to consult chap 5 of Radiotron v4. If anything that info could be transformed into a proper approximation. One thing I wasn't co...