Search found 993 matches

by drhulsey
Tue Jun 11, 2013 12:00 am
Forum: Technical Discussion
Topic: VVR in a AC15
Replies: 5
Views: 1036

Re: VVR in a AC15

Bump. Can anyone give me a hint about the correct placement of the VVR in an AC15?
by drhulsey
Sun Jun 09, 2013 4:56 pm
Forum: Technical Discussion
Topic: VVR in a AC15
Replies: 5
Views: 1036

Re: VVR in a AC15

I think you want to keep the reservoir cap on the input side of the VVR, and put the VVR afetr all the fuses, so that would mean taking the VVR input voltage from the node downstream of the one marked "B", at the top of C2, and breaking the power supply string after that. I see what you mean. I'll ...
by drhulsey
Sun Jun 09, 2013 3:38 pm
Forum: Technical Discussion
Topic: VVR in a AC15
Replies: 5
Views: 1036

VVR in a AC15

I have a production Vox AC15 with the contemporary PCB layout. I want to put the appropriate version of Dana's VVR in it. There are fuses in the B+ line. This is what it looks like in the amp. The single blue wire is at point A. Point B might be the obvious place to put the VVR, but this on the PCB....
by drhulsey
Sun Jun 09, 2013 10:50 am
Forum: Technical Discussion
Topic: 2Watt Sub Miniature Plexi
Replies: 245
Views: 49667

Re: 2Watt Sub Miniature Plexi

Good to be back! Maybe I posted this on the wrong thread. Is there a separate thread for the Lil' Devil?
by drhulsey
Sun Jun 09, 2013 10:11 am
Forum: Technical Discussion
Topic: 2Watt Sub Miniature Plexi
Replies: 245
Views: 49667

Re: 2Watt Sub Miniature Plexi

If anyone is listening at the NSA, you're welcome tomchime in, too! :D
by drhulsey
Sat Jun 08, 2013 10:49 pm
Forum: Technical Discussion
Topic: 2Watt Sub Miniature Plexi
Replies: 245
Views: 49667

Re: 2Watt Sub Miniature Plexi

The instruction manual says the B+ should go down to 50 and the Bias should go to -50. I'm not hitting those parameters.
by drhulsey
Sat Jun 08, 2013 10:02 pm
Forum: Technical Discussion
Topic: 2Watt Sub Miniature Plexi
Replies: 245
Views: 49667

Re: 2Watt Sub Miniature Plexi

Diode in the PS was reversed :oops: I get 175V at B+, but it only goes down to 117V. On the bias voltage, it ranges from 25-34V with adjustment of the bias pot.
by drhulsey
Sat Jun 08, 2013 8:57 pm
Forum: Technical Discussion
Topic: 2Watt Sub Miniature Plexi
Replies: 245
Views: 49667

Re: 2Watt Sub Miniature Plexi

I've been playing a lot and not building much. It's good to be back. I am tracing all the wiring and will chek the polarity on the caps, as you suggested.

Thanks!
by drhulsey
Sat Jun 08, 2013 8:16 pm
Forum: Technical Discussion
Topic: 2Watt Sub Miniature Plexi
Replies: 245
Views: 49667

Blowing fuses in Lil' Devil

I finally got around to finishing the Lil' Devil. Attempting start up, I have 120V at the mains input. I am blowing fuses every time I turn it on. Any common causes?
by drhulsey
Sun Feb 21, 2010 3:38 pm
Forum: Garage Talk
Topic: Email service
Replies: 11
Views: 2049

Re: Email service

Andy Le Blanc wrote:paranoid schizophrenic's have enemies two ...
Andy's right. As Richard Nixon said, "Just because you're paranoid doesn't mean that somebody isn't out to get you." :wink:
by drhulsey
Sun Feb 21, 2010 3:33 pm
Forum: Technical Discussion
Topic: One board amp
Replies: 28
Views: 5067

Re: One board amp

... You can wax poetic with the wire dress or layout all you want, but it doesn't help... Larry Mann's cabs don't add to the tone, either, but they sure can make you do a double-take 8) The guts aren't often seen, but, when they are, attention to detail is usually a positive sign. That could be att...
by drhulsey
Sat Feb 20, 2010 3:36 pm
Forum: Technical Discussion
Topic: One board amp
Replies: 28
Views: 5067

Re: One board amp

paulster wrote:Here's some food for thought...
Those pictures are breath-taking 8)
What a work of art :D
by drhulsey
Thu Feb 18, 2010 3:34 am
Forum: Garage Talk
Topic: debt free
Replies: 51
Views: 6962

Re: debt free

... supreme court just removed a hundred years of election finance reform... I agree and so does 80% of everyone else. ... even fraud should left to it own course and the market will correct naturally... If we don't follow the law, it's not a free market. ... American democracy has always been hope...
by drhulsey
Thu Feb 18, 2010 3:11 am
Forum: Technical Discussion
Topic: Amp Cradles: make one or buy one?
Replies: 43
Views: 11682

Re: Amp Cradles: make one or buy one?

... The L pieces appear to be the hardest to come by. I used aluminum extrusions for the ends: two pieces, one with a 45 degree angle on one end. Then it was just a matter of drilling a hole for the panavise post. That was drilled in a rounded nub that attaches to the end of the extrusion. I drille...
by drhulsey
Thu Feb 18, 2010 2:52 am
Forum: Technical Discussion
Topic: Pedal Board Cable Systems
Replies: 28
Views: 9350

Re: Pedal Board Cable Systems

... I was wondering if any of you had made a snake for your pedal boards... I have bundled my individual cables and used snake cables. Bundling just leaves a little to be desired in flexibility. Snake cable can be bought with whatever number of channels you need. It is flexible and easy to work wit...