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- Path: sparky!uunet!cs.utexas.edu!uwm.edu!csd4.csd.uwm.edu!info-high-audio-request
- From: msv@unlinfo.unl.edu (mark vanroojen)
- Newsgroups: rec.audio.high-end
- Subject: hk citation II
- Date: 24 Dec 1992 20:44:58 GMT
- Organization: University of Nebraska--Lincoln
- Lines: 23
- Approved: tjk@csd4.csd.uwm.edu
- (5.65c/IDA-1.4.4 for rec-audio-high-end@uunet.uu.net); Thu, 24 Dec 1992 14:45:00 -0600
- Distribution: world
- Message-ID: <1hn1d1INNih4@uwm.edu>
- NNTP-Posting-Host: 129.89.7.4
- Originator: tjk@csd4.csd.uwm.edu
-
- The HK citation II is not an amp that is readily modifiable into a
- class A design. (I'm actually just going by what I know of it's
- output rating.) The B+ on the output tubes is high enough that the
- plates would be way over their dissipation ratings if run class A.
- (If run in that fashion, it would be no wonder if a tube, KT88 or
- otherwise exploded as someone suggested to you.) Furthermore, the
- Power transformer is not capable of putting out the kind of current
- necessary to run the amp class A.
-
- The citation II is a favorite with modifiers because of it's highly
- regarded transformers. Many suggested circuit suggestions are
- floating around. Try to snag one of those. MFA used to build it's
- amps using the citation transformers.
-
- As for the difference between 6550s and KT88s, I suspect that the
- origin of the tube is more important than the name on it. Old stock
- British and American tubes tend to be better than what is made now a
- days, though the situation is improving.
-
- Hope this helps!
-
- MvR
-
-