|
Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
|
|
|
Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
|
In Reply to: Driving 6Y6GTs with El Cheapo 12AT7 front end? posted by jyourison on April 25, 2013 at 10:47:34:
Jeff,
Take a look at the 6Y6 Data sheet. Notice the low max. plate voltage limit. That does not mesh at all well with the 12AT7 LTP front end found in "El Cheapo".
I take it you want to do another PP amp. Consider a CCS loaded 6922 section voltage amplifier DC coupled to an IRFBC20 "concertina" phase splitter. Use "fixed" bias "finals", with an individual trim pot for each tube. Bridge rectify the O/P of your Triad N-77U to get the B+. CLC filter. The rail will come in at approx. 165 V. and you'll have way more current than you can use. :> D Go full pentode mode and regulate g2 B+ with a VR105. LED bias the voltage gain triode and follow the "textbook" O/P trafo to voltage amplifier cathode GNFB setup.
Edcor's CXPP30-MS-5K seems about right, assuming "normal" Class "AB1" operation is chosen for the O/P stage.
Eli D.
This post is made possible by the generous support of people like you and our sponsors:
Follow Ups
- RE: Driving 6Y6GTs with El Cheapo 12AT7 front end? - Eli Duttman 04/25/1317:20:21 04/25/13 (18)
- RE: Driving 6Y6GTs with El Cheapo 12AT7 front end? - jyourison 19:03:17 04/25/13 (17)
- RE: Driving 6Y6GTs with El Cheapo 12AT7 front end? - Eli Duttman 22:06:45 04/25/13 (16)
- Would any of these triodes also work? - jyourison 17:13:45 04/26/13 (15)
- RE: Would any of these triodes also work? - Eli Duttman 18:08:07 04/26/13 (14)
- O/P Stage - Eli Duttman 08:06:52 04/29/13 (4)
- Bias - Eli Duttman 12:45:52 04/29/13 (3)
- Small Signal Hen Scratches - Eli Duttman 20:11:16 04/28/13 (0)
- B+ PSU Hen Scratches - Eli Duttman 00:36:32 04/28/13 (6)
- RE: B+ PSU Hen Scratches - jyourison 03:32:34 05/6/13 (1)
- RE: B+ PSU Hen Scratches - Eli Duttman 05:44:53 05/7/13 (0)
- Capacitor Value - Eli Duttman 17:50:51 04/28/13 (0)
- RE: B+ PSU Hen Scratches - jyourison 08:48:21 04/28/13 (1)
- RE: B+ PSU Hen Scratches - Eli Duttman 09:41:50 04/28/13 (0)
- Addendum - Eli Duttman 01:30:02 04/28/13 (0)
- RE: Would any of these triodes also work? - Eli Duttman 21:45:46 04/27/13 (0)
Top of Page ]
[ Contact Us ]
[ Support/Wish List ]
[ Copyright © 2025, Audio Asylum, all rights reserved ]
