Search found 8 matches

by DonP
Wed Feb 25, 2009 10:30 am
Forum: Technical Discussion
Topic: 70 Vibro Champ Before and After
Replies: 11
Views: 2367

Re: 70 Vibro Champ Before and After

Black looks great to me. I never liked the Silver Face look.
by DonP
Thu Feb 19, 2009 6:01 pm
Forum: Technical Discussion
Topic: Breadboarding didn't go as planned
Replies: 4
Views: 1156

Re: Breadboarding didn't go as planned

I think you need to post a schematic of what you are trying to do.

Also, the reason for the voltage drop on your heaters is that your power supply can't supply the current to maintain the 6.3 volts.

Good luck and keep studying!
by DonP
Thu Feb 19, 2009 4:28 am
Forum: Technical Discussion
Topic: KMD amplifier info **pics added**
Replies: 24
Views: 12337

Re: KMD amplifier info **pics added**

I don't know if it's the same company, but in the early 90s KMD made hi-fi speakers, and of all things, PC computers. My first PC in 1990 was a KMD 386 40Mhz (AMD chip) Windows 3.0 and DOS 5.0 LOL! The transformer iron looks good. What year is this amp from? My 1986ish Laney's (AORs) don't look like...
by DonP
Thu Feb 19, 2009 4:03 am
Forum: Technical Discussion
Topic: What would you build...
Replies: 9
Views: 1741

Re: What would you build...

I would build one of these: A KT88 might be hard to pull off. Allen is just down the road from me (well, maybe 40+ miles). Has anyone tried one of these? It's very similar to my 2.5 watt build, except that I went with the cathode follower before the tone stack. I like the feedback - I'd be tempted ...
by DonP
Thu Feb 19, 2009 4:02 am
Forum: Technical Discussion
Topic: What would you build...
Replies: 9
Views: 1741

Re: What would you build...

i dont think it will do it for a pp. how bout a kendrick roughneck 6l6 maybe a octal preamp tube could be interesting. or build a marshall inspired valve jr i think you could use a couple of 12ax7 with that pt. check over at sewatt they got some cool se stuff great guys to Yep, for the preamp, I'm ...
by DonP
Wed Feb 18, 2009 9:12 pm
Forum: Technical Discussion
Topic: What would you build...
Replies: 9
Views: 1741

Re: What would you build...

I was thinking the 5Y3 would drop some of that voltage. I have some 3H chokes as well.

No chance of a push pull pair, huh?
by DonP
Wed Feb 18, 2009 8:22 pm
Forum: Technical Discussion
Topic: What would you build...
Replies: 9
Views: 1741

What would you build...

If you had a 320-0-320 tranny that can deliver 85ma?

Taps for 5v 3a and 6.3v 3.2a.

I'm not sure if the HT current is enough to support a pair of 6V6 or EL84s.

Thanks.
by DonP
Wed Feb 18, 2009 8:19 pm
Forum: Technical Discussion
Topic: Chassis material thickness?
Replies: 4
Views: 1174

Re: Chassis material thickness?

I'd say it depends on how big the chassis will be and how big your transformers are.

A bigger chassis needs to be stiffer and large trannies need a lot more support than smaller ones.