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6P41s vs 7868
6P41s vs 7868
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Old 9th February 2018, 09:29 PM   #21
davorin is offline davorin  Croatia
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Quote:
Originally Posted by Kay Pirinha View Post
Are there available any datasheets for these 6P41S? Frank doesn't appear to have them handy...
Best regards!
Original files:

Some curves:
Attached Images
File Type: jpg 6p41s-0.jpg (63.7 KB, 247 views)
File Type: jpg 6p41s-1.jpg (79.1 KB, 245 views)
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File Type: jpg 6p41s-4.jpg (99.6 KB, 226 views)
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File Type: jpg 6p41s-7.jpg (106.7 KB, 21 views)
File Type: jpg 6p41s-8.jpg (102.9 KB, 31 views)
File Type: jpg 6p41s-9.jpg (102.3 KB, 30 views)
File Type: jpg 6p41s-10.jpg (101.4 KB, 22 views)
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Old 10th February 2018, 09:03 AM   #22
Kay Pirinha is offline Kay Pirinha  Germany
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Quote:
Originally Posted by davorin View Post
Some curves:
Thanks, Davorin!

Now I'm about to find someone to teach me the Russian language .

Best regards!
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Old 10th February 2018, 04:19 PM   #23
artosalo is online now artosalo  Finland
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Quote:
I intend to try the 6P41s some time to see what I can squeeze out of them.
I done some tests with 6P41S as a PP-amplifier. Here are results with 40% UL, triode connected and pentode connected with different operating conditions.
Attached is also the schematic of the test circuit. All measurements were done without GNFB.
Attached Images
File Type: jpg 6P41S_6F12P_PP.JPG (106.2 KB, 140 views)
Attached Files
File Type: pdf 6P41S_PP_eng.pdf (27.8 KB, 70 views)

Last edited by artosalo; 10th February 2018 at 04:25 PM.
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Old 10th February 2018, 04:33 PM   #24
huggygood is offline huggygood  France
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good ! i have a pair of hammond 1560 in my stock
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Old 14th February 2018, 10:14 AM   #25
huggygood is offline huggygood  France
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i received my 7591 quad
I'm waiting for my octal socket
to be continued ...
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Old 2nd March 2018, 10:01 PM   #26
cags is offline cags  United States
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Hello Toprepairman,
I am in process of a total restoration to convert Rowe R-4359 amp to use as a stand alone audio amp for my sound system. Am searching for parts list and schematics. I have come across of schematic by secret4mula but not clearly readable. Any info you can assist me with will be greatly appreciated. Would you know the manufacturer of the output trannies? Thanks again .

Regards,
Joe
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Old 4th March 2018, 01:05 PM   #27
toprepairman is offline toprepairman  United Kingdom
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Hi Joe.
Like you I only found a poorish copy on the net and then redrew it by hand.
I really don't know who made the transformers. I have stripped out the surplus wiring with the relay etc, with a view to converting to a straightforward stereo amp.
I got a set of 6P41's but they don't really perform as the originals so I may remove the bases and fit octals to run with 6L6/5881 type valves.
I'm not sure when I'll get round to doing this as I have another, bigger, more pressing project on the go in the shape of a house rebuild. Currently I'm looking at a big hole in the ground with a load of concrete in it. Behind is a huge pile of clay that came out of the hole so this is taking priority just now.
Henry
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Old 4th March 2018, 01:40 PM   #28
Charm is offline Charm  Russian Federation
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Quote:
Originally Posted by Kay Pirinha View Post
Thanks, Davorin!
Now I'm about to find someone to teach me the Russian language .
Intelligence reported, the analog is EL508, PL508..

Last edited by Charm; 4th March 2018 at 01:42 PM.
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Old 16th April 2018, 05:53 AM   #29
huggygood is offline huggygood  France
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I just picked a ami-rowe 4359A but with missing preamp and missing tubes ...
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