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Author Topic: Need a TS520SE Guru  (Read 424 times)
KE3GK
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Posts: 12


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« on: August 31, 2002, 01:59:01 AM »

It's 2am and I have been working on the 520SE for a few hours now.  Two resistors blew under the final section and I popped the 6amp fuse.  How - dunno. Well, I suspect that after I added a MC50 with a Heil cartridge that I overdid something.   Anyway I replaced the resistors, replaced my old worn and tired 6146B's with 6146W's and replaced the 12BY7A driver tube.  Went thru the neutralizing thing and now I can't seem to get a output greater than 40 watts on all bands.  (Before the resistors fried, I could tune up to about 80 on 10m and about 100 on the other bands).

Can anyone give me some areas to look at.

Signed ...

Agitated, dumbfounded and Tired ...
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KE4DRN
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Posts: 3734




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« Reply #1 on: September 07, 2002, 12:25:50 AM »

Hi,

Try this link:

http://mailman.qth.net/mailman/listinfo/kenwood

or you can repost your question to the elmer forum.

Do you have the service manual for the 520 ?

73 james
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KO0T
Member

Posts: 1




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« Reply #2 on: January 17, 2003, 02:24:47 PM »

I suspect your problem is with the 6146W finals you installed.  Not all 6146W's are alike.  Some are based on the 6146A and some on the 6146B, depending on the manufacturer's date of manufacture.  Several articles have been written about this, but I can't point you to them.  Anyway, the 6146A and 6146B tubes are quite different in several respects, and the 6146A versions will be much more limiting in output power.  
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PA3AGZ
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Posts: 28




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« Reply #3 on: July 19, 2007, 01:51:45 AM »



I hope this is still valid.

Check Ken - K4EAA's website.

http://www.k4eaa.com/index.html

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