Search found 17 matches

by neilium
Thu Mar 17, 2005 3:07 pm
Forum: Trainwreck Discussion
Topic: The Porkchop has landed
Replies: 6
Views: 3542

Re: The Porkchop has landed

Justin, Nothing that fancy. I designed it in Illustrator, printed it to heavy paper and spray-glued it to a piece of sheet brass. I then did a fake lamination with clear packing tape. (I work in graphics and have made mock-ups of just about everything that can be printed, so this was sort of a busma...
by neilium
Thu Mar 17, 2005 7:32 am
Forum: Trainwreck Discussion
Topic: The Porkchop has landed
Replies: 6
Views: 3542

Re: The Porkchop has landed

Omar, Thanks, for the kind words and your maintenance of this NG. Soundclips are maybe a week away, but things are shaping up with this amp. I've chased down a problem with very strident bass (I replaced the caps around the PI with the values in the schematic as opposed to what I thought should got ...
by neilium
Mon Mar 14, 2005 6:44 pm
Forum: Trainwreck Discussion
Topic: The Porkchop has landed
Replies: 6
Views: 3542

Re: The Porkchop has landed

Soundclips are on route; the sound right now is too strident in the bass. I'm in tweaksville for a week before I can roll out an mp3 of my second rate guitar playing.

-n
by neilium
Mon Mar 14, 2005 5:58 pm
Forum: Trainwreck Discussion
Topic: Black Gate capacitor opinions
Replies: 13
Views: 7545

Re: Black Gate capacitor opinions

To second what Dai said, if you think of an amplifier as a modulated power supply, it's easy to see that PS components are part of the signal path. I used the Black Gate 50/50 500v in a hifi amp. I liked it better than the LCR cap it replaced, but when I rebuilt the amp on a bigger chassis I replace...
by neilium
Sun Mar 13, 2005 8:40 pm
Forum: Trainwreck Discussion
Topic: The Porkchop has landed
Replies: 6
Views: 3542

The Porkchop has landed

Hey, Thanks to everyone's direct and indirect help, I got this Rocket/AC-15 amp together and sounding ok. There's some things I want to tweak, of course, but the thing works and doesn't hum too much. It has two channels which are internally jumpered. One is basically the Rocket, the second is a take...
by neilium
Fri Mar 11, 2005 11:08 pm
Forum: Trainwreck Discussion
Topic: Trainflex
Replies: 29
Views: 10960

Re: Trainflex

Omar,

This merits a post on the permanent collection. Great work, Ross.

-n
by neilium
Tue Mar 01, 2005 8:16 pm
Forum: Trainwreck Discussion
Topic: Book/Gar Gilles-The How and Why of Tube Amps as Gar Sees It
Replies: 16
Views: 10532

Re: Book/Gar Gilles-The How and Why of Tube Amps as Gar Sees It

Any book I have not mentionned and that should be on my wish list? The ARRL handbook, one from before the 70's. Contains my favorite chapter on power supplies and regulation. Granted, there's a lot of stuff in there guitar amp builders have no use for, but who better to turn to when dealing with RF...
by neilium
Tue Mar 01, 2005 8:06 pm
Forum: Trainwreck Discussion
Topic: two-point star ground q
Replies: 3
Views: 3259

two-point star ground q

Hi all, I want to double-check that my understanding of two point star grounding is correct, as per Randall Aiken's article on the subject. 1. First cap after the rectifier, B+ center tap and output stage cathode resistors are grounded on one star ground, preferably close to the first cap's negative...
by neilium
Fri Feb 25, 2005 8:23 pm
Forum: Trainwreck Discussion
Topic: Voltages and rectifier tubes in my 20 watt rocket style amp
Replies: 2
Views: 2652

Re: Voltages and rectifier tubes in my 20 watt rocket style amp

Chris,

Good stuff.

Pics?

MP3s?

What transformers are you using?

-Neil
by neilium
Thu Feb 24, 2005 5:26 am
Forum: Trainwreck Discussion
Topic: Ground buss
Replies: 2
Views: 2253

Re: Ground buss

Omar,

Sane advice. Thank you!

-neil
by neilium
Wed Feb 23, 2005 3:01 pm
Forum: Trainwreck Discussion
Topic: Ground buss
Replies: 2
Views: 2253

Ground buss

Hi,

What grounding scheme do all y'all recommend? I like the idea of a ground buss across the back of the pots, but I imagine a world of hurt if I had to replace a pot.

-neil
by neilium
Mon Feb 21, 2005 5:13 am
Forum: Trainwreck Discussion
Topic: Calling Mark Abbott!!!!
Replies: 3
Views: 3164

Re: Calling Mark Abbott!!!!

Mark,

I've started work on a 15-watt Rocket-ish amp. Your notes are a big help. I finished the metalwork and bolting on the iron and sockets. Using an OPT from a Harmon Kardon integrated amp.

I really like the AC-30, but it's too loud for any gig I'll ever play, so I opted for 15 watts.

-Neil
by neilium
Mon Feb 14, 2005 7:59 pm
Forum: Trainwreck Discussion
Topic: Heyboer Transformers
Replies: 18
Views: 13702

Re: Heyboer Transformers

Aye! I'll take a set.

-neil
by neilium
Thu Jan 27, 2005 6:32 pm
Forum: Trainwreck Discussion
Topic: I Don't Get It
Replies: 16
Views: 14516

Re: 'I Don't Get It'

begging you pardon in advance for the rant that follows... Mad Scientist? Lord Valve? I'm sorry, but you don't get to pick your own nickname. A nickname is assigned to you by your alleged friends after you do something stupid or when they're too stupid/drunk to remember your name. It should be short...