RE: Eico HF-32 vs HF-52

Posted by Michael Samra (D) on March 23, 2014 at 20:02:18

In Reply to: Eico HF-32 vs HF-52 posted by rockdoc on March 23, 2014 at 14:10:34:

Those are both FABULOUS amplifiers..They are the integrated amp versions of the HF30 and HF50 power amps..If it were me,I would use a separate preamp but,it isn't necessary..You can mod the HF52s to run KT88s and Dave Gillepsie has a design to do just that..Both the HF50s and HF60s along with the HF52s OPTs are in the range of 6550/KT88s.You basically increase increase drive voltage from the 6SN7 to drive the outputs,
The HF32 is very nice as well..While you do contend with having four output tubes per amp,they aren't that expensive of a tube and you get more power and a lower primary impedance which can be a good thing depending on the speaker you are driving.
"For every complex problem there is an answer that is clear, simple, and wrong" H. L. Mencken

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Follow Ups Full Thread

Topic - Eico HF-32 vs HF-52 - rockdoc 14:10:34 03/23/14 (15)

RE: Eico HF-32 vs HF-52 - jdiamantis 20:19:52 03/25/14 (0)

RE: Eico HF-32 vs HF-52 - Michael Samra 20:02:18 03/23/14 (1)

Gillespie modded HF-52 in triode? - rockdoc 07:59:39 03/26/14 (0)

The HF-52 is a nice amplifer with exceptional output iron - mhardy6647 14:50:01 03/23/14 (8)

RE: The HF-52 is a nice amplifer with exceptional output iron - rockdoc 15:11:24 03/23/14 (0)

RE: The HF-52 is a nice amplifer with exceptional output iron - rockdoc 15:07:25 03/23/14 (6)

RE: The HF-52 is a nice amplifer with exceptional output iron - Bold Eagle 09:32:05 03/25/14 (0)

I have both the HF50s and the HF60s and I can tell you honestly - Michael Samra 17:20:56 03/24/14 (4)

RE: I have both the HF50s and the HF60s and I can tell you honestly - rockdoc 18:13:59 03/24/14 (3)

RE: I have both the HF50s and the HF60s and I can tell you honestly - Michael Samra 20:29:48 03/24/14 (2)

Dave Gillespie mods for HF-52 - rockdoc 05:21:55 03/25/14 (1)

RE: Dave Gillespie mods for HF-52 - Michael Samra 13:47:56 03/25/14 (0)

RE: Eico HF-32 vs HF-52 - rockdoc 14:16:19 03/23/14 (2)

pick up a pair of HF-12s or a single HF-81 - mhardy6647 14:51:06 03/23/14 (1)

RE: I already have both (all 3 actually) nt - rockdoc 13:41:59 03/25/14 (0)

Follow Ups

RE: Eico HF-32 vs HF-52 - Michael Samra 20:02:18 03/23/14 (1)

Gillespie modded HF-52 in triode? - rockdoc 07:59:39 03/26/14 (0)

RE: Eico HF-32 vs HF-52

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