|
SET Asylum Single Ended Triodes (SETs), the ultimate tube lovers dream. |
|
|
|
SET Asylum Single Ended Triodes (SETs), the ultimate tube lovers dream. |
|
In Reply to: Hum, review, KT88's Rp and 300B's posted by Gordon Rankin on May 31, 2001 at 09:13:58:
Dear Gordon,
I don't understand where you are coming from.
Your explanation sounds logical enough, but why didn't you fix it over the phone and why did the reviewer have to call another expert to come over and change the internals if it was so elementry?Secondly, I still don't understand why you stated the plate resistance of a KT88 was too high when it was the lower than most all the other DHTs out there? Was it a slip up? You have never explained yourself or even just apologized for the misinformation. This is clear, stated in the spec sheet and even if it wasn't, is easily calculated.
Third, under what condition were the KT88s tested in college? Do you just blindly accept what the professors say? What was the Rp, bias, plate current etc? Did the professors know what they were doing? I had a couple of professors (who taught tubes in the 60s) who were hired to design a lower freq transmitter for a Transmitting company some 21 years ago. The company who hired them sold some and they nearly all failed. I got to discuss the failures with the professors and found out they didn't know the first thing about using the tubes or reading the spec sheets, even though they had taught tubes for years.
Did your instructors know what they were doing? I don't know, except that the KT88 can put out 11 watts rms with approx. 1.9% distortion as actually measured.
I know what is being built using 2A3s, using 2.5K trannies that are being advertized and sold, and advertised as 3.5 watts output matches the spec sheet, so I can only assume the distortion is 5% like the spec sheet states, and not counting previous stages. This would only be different if the new 2A3s are being designed for lower distortion or distortion cancelling circuits are being used.
Anyway, I hope you apologize for your mistaken misinformation about the KT88 triode Rp being too high.Sincerely,
Steve Sammet
SAS Audio Labs
This post is made possible by the generous support of people like you and our sponsors:
Follow Ups
- Re: Hum, review, KT88's Rp and 300B's - Steve 05/31/0114:55:14 05/31/01 (5)
- Steve, please, STOP THE INSANITY!!!!!! (nt) - Major Edwin Armstrong 16:42:38 05/31/01 (2)
- Re: Steve, please, STOP THE INSANITY!!!!!! (nt) - Steve 02:14:21 06/4/01 (0)
- I haven't seen anyone use the KT88 properly yet. - Steve 02:26:31 06/2/01 (0)
- Re: Hum, review, KT88's Rp and 300B's - Gordon Rankin 16:28:36 05/31/01 (1)
- Thanks Gordon. I am glad we had this conversation - Steve 20:05:26 05/31/01 (0)
Top of Page ]
[ Contact Us ]
[ Support/Wish List ]
[ Copyright © 2025, Audio Asylum, all rights reserved ]
