Its been a while but I believe it was a Citation II. Also had
several Dynakit 50 Watt amps. Had to get rid of them all.
I miss the theater speakers. They were c.1936 RCA Shearer horns
from a movie studio with M-G-M spec HF drivers. I built cross-over
networks for them. Fields ran off 12 V. battery chargers. They were
probably not very high fidelity but they had a very distinct presence
and very clean low end. At the time my ears still worked well, no more.
The HF drivers were built by Lansing and had aluminum diaphragms in
place of the phenolic ones used in RCA's standard theater speakers. I am
pretty sure the woofers were made by Jensen but am not sure, RCA might
have made them. I measured the mechanical and acoustical characterists
and found they were right for the horns. I am pretty sure these speakers
were at least inpired by the experimental two way horns developed by
Bell Labs for their stereo experiments, but very much simpler. Western
Electric and Lansing built similar horns. Too OT, will quit.
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On 12/1/2024 9:12 AM, Jacques_VE2JFE via groups.io wrote:
Hi Richard,
Just curious: was your HK amp a Citation II model ?
Just a remark also: this is the second time I see the 5881 tube referred
as the US equivalent of the KT88, or the reverse, whatever…
The US “equivalent” of the KT88 is the 6550 (Tung-Sol produced and
marketed those first).
The KT88 from the General Electric Co. of England came after as a
“replacement” of the 6550.
But the ORIGINAL KT88 is very different from the 6550 and does not
“sound” the same, despite having the same specifications.
The 5881 (from Tung-Sol, again) is a variant of the 6L6 and was
sometimes used as a KT66 substitute, despite a better choice had been a
7581A.
*73, Jacques, VE2JFE in Montreal*
--
Richard Knoppow
Los Angeles
WB6KBL
SKCC 19998
