Search found 80 matches

by KGW
Tue Dec 12, 2006 6:20 pm
Forum: Trainwreck Discussion
Topic: A "Better" idea for an attenuator
Replies: 29
Views: 6993

Re: A "Better" idea for an attenuator

AdmiralB wrote:I see it as the opposite - fixed shunt, variable series.
No, that is not how they work. Read this http://www.goldpt.com/how.html
by KGW
Mon Dec 11, 2006 7:33 pm
Forum: Trainwreck Discussion
Topic: A "Better" idea for an attenuator
Replies: 29
Views: 6993

A "Better" idea for an attenuator

I've been following the "Airbrake" thread. It looks as if the Airbrake is shunt attenuator - fixed series resistor and switchable shunt resistors (using taps of a big WW). These work fine - my hi-fi preamp has one. However the impedence changes with each switch position. If we built a ladder attenua...
by KGW
Tue Dec 05, 2006 5:07 pm
Forum: Trainwreck Discussion
Topic: Airbrake schematic or layout
Replies: 121
Views: 103813

Re: Airbrake schematic or layout

Could I please have a copy of the schematic as well? Por favor. Also, I have a THD Hotplate. Does the Airbrake sound better? My Hotplate injects some strange sound on sustained single notes. It is hard to describe, but the low end seems to drop out and the sustain sounds modulated - kind of like a v...
by KGW
Mon Dec 04, 2006 8:39 pm
Forum: Trainwreck Discussion
Topic: External biasing wiring?
Replies: 3
Views: 1303

Re: External biasing wiring?

Putting together an express and have some questions. I have an 50k 10 turn external bias pot that I will be mounting similar to the komet.The pot has three leads one on the end of the resistor,one in the middle of the resistor ,and the last one goes to ground.Does the top resistor one go to the 47k...
by KGW
Tue Nov 28, 2006 8:03 pm
Forum: Trainwreck Discussion
Topic: Transformer sets available.
Replies: 19
Views: 6080

Re: Transformer sets available.

Hmmm... I am building an Express, so I assume that the iron I got from you will work fine. However, I was thinking that having both 5k2 and 6k6 primaries on the OT would be nice. Does anyone know how soon will Moose have more (of the new iron) available? If it is going to be soon, I would rather hav...