6.6 K is correct
Measured from an original Express that sounded as it should
Search found 37 matches
- Wed Jan 03, 2024 1:44 pm
- Forum: Trainwreck Discussion
- Topic: Edcor Transformers for Trainwreck Express
- Replies: 6
- Views: 5050
- Tue Nov 01, 2022 8:38 pm
- Forum: Trainwreck Discussion
- Topic: New Express project(s)
- Replies: 29
- Views: 4792
Re: New Express project(s)
very nice work!
- Thu May 05, 2022 5:53 pm
- Forum: Trainwreck Discussion
- Topic: Trainwreck turret boards
- Replies: 9
- Views: 2447
Trainwreck turret boards
Got my cnc setup to do turret boards
- Mon Apr 25, 2022 6:42 pm
- Forum: Trainwreck Discussion
- Topic: Rate the Express output transformers.
- Replies: 102
- Views: 90342
Re: Rate the Express output transformers.
No sir I use star washers and I can get them tight enough to bite into the aluminum
There is a chance of dissimilar metal corrosion over time . You just need to keep an eye on it
Thanks for the kind comments on the build
There is a chance of dissimilar metal corrosion over time . You just need to keep an eye on it
Thanks for the kind comments on the build
- Mon Apr 11, 2022 12:40 pm
- Forum: Trainwreck Discussion
- Topic: Rate the Express output transformers.
- Replies: 102
- Views: 90342
Re: Rate the Express output transformers.
Here you go
- Sat Apr 09, 2022 8:49 pm
- Forum: Trainwreck Discussion
- Topic: Rate the Express output transformers.
- Replies: 102
- Views: 90342
Re: Rate the Express output transformers.
Here is a short video done with my iPhone 3rd build with Heyboer power and output trans. New TubeAmp Doctor / PS Vane EL34’s and JJ 803s 12AX7’s I think pretty close to the mark I compared to recording of my original Express I had in the early 90’s https://youtube.com/shorts/__tE0_6Lq-Y?feature=share
- Mon Feb 07, 2022 11:19 pm
- Forum: Trainwreck Discussion
- Topic: Rate the Express output transformers.
- Replies: 102
- Views: 90342
Re: Rate the Express output transformers.
i just built another express with a 6.6k primary output. (heyboer) Pacific 7.5k sounds good but different then an express Now the amp sounds close to a real express Their power transformer also has to low a B+ I will install the correct power trans (heyboer) that should make the amp as close to an E...
- Sun Feb 06, 2022 1:05 am
- Forum: Trainwreck Discussion
- Topic: Rate the Express output transformers.
- Replies: 102
- Views: 90342
Re: Rate the Express output transformers.
very nice work!
- Tue Feb 01, 2022 7:35 pm
- Forum: Trainwreck Discussion
- Topic: Rate the Express output transformers.
- Replies: 102
- Views: 90342
Re: Rate the Express output transformers.
Opinions of Edcore trans please
Thanks
Thanks
- Fri Jan 14, 2022 10:15 pm
- Forum: Trainwreck Discussion
- Topic: Rate the Express output transformers.
- Replies: 102
- Views: 90342
Re: Rate the Express output transformers.
Actually another good way to bias an amp is to get in a dark room have someone drive the amp hard watch the plates glow red and then back it down just a hair
- Thu Jan 13, 2022 5:28 pm
- Forum: Trainwreck Discussion
- Topic: Rate the Express output transformers.
- Replies: 102
- Views: 90342
Re: Rate the Express output transformers.
My original express was 400 v dc b+
With the new pacific power I am only getting 385 v dc B+
Bias set at 46 ma
With the new pacific power I am only getting 385 v dc B+
Bias set at 46 ma
- Thu Jan 13, 2022 4:43 pm
- Forum: Trainwreck Discussion
- Topic: Rate the Express output transformers.
- Replies: 102
- Views: 90342
Re: Rate the Express output transformers.
Also I don’t understand why the power trans is the wrong voltage and does not have a 5volt tap for a rectifier tube that is used on the rocket
The HV taps should be 300-0-300
Not 280-0-280
Very strange to me
The HV taps should be 300-0-300
Not 280-0-280
Very strange to me
- Thu Jan 13, 2022 3:10 pm
- Forum: Trainwreck Discussion
- Topic: Rate the Express output transformers.
- Replies: 102
- Views: 90342
- Thu Jan 13, 2022 12:29 pm
- Forum: Trainwreck Discussion
- Topic: Rate the Express output transformers.
- Replies: 102
- Views: 90342
- Thu Jan 13, 2022 12:18 pm
- Forum: Trainwreck Discussion
- Topic: Rate the Express output transformers.
- Replies: 102
- Views: 90342
Re: Rate the Express output transformers.
http://marstran.com/Measuring%20Primary%20Impedance.htm
A method similar to this was used
I confirmed this with the owner of the amp
A method similar to this was used
I confirmed this with the owner of the amp