[Amps] Tl 922 mods

[Jim W7RY]

Nice boards. Great idea on the LEDs.  But really PRICY!

And Don I see you also subscribe to Rich's parasitic myths and how to cure 
them. As well as the filament voltage "issues" which I believe are 
overblown. I don’t like the grids not connected directly to ground the way 
Eimac recommends them to be.

All of the TL-922s that I have put new tubes into had the tubes destroyed by 
them shorting (which they do in all amplifiers, even ones with parasitic 
mods) or gassey tubes.

In all my years, I have never seen a low output 3-500 tube from a ham 
amplifier. Only damaged tubes either mechanically (plates falling off) or 
eclectically.

73
Jim W7RY



-----Original Message----- 
From: Don Kessler
Sent: Wednesday, October 28, 2015 7:03 PM
To: amps at contesting.com
Subject: Re: [Amps] Tl 922 mods


Please consider this as well:
http://kesslerengineeringllc.com/tl922.html

73,
Don

On 10/28/2015 06:16 PM, Alek Petkovic wrote:
> Also see:
>
> http://somis.org/
> There's a wealth of good stuff on the TL-922 there.
>
>  http://www.pa0fri.com/
> Click on Mods and then Kenwood TL-911 modifications. It actually describes 
> the TL-922.
>
> 73, Alek
> VK6APK
> *
> *
> On 29/10/2015 5:30 AM, Vic Rosenthal 4X6GP/K2VCO wrote:
>> W8ZR designed a sequencer board sold by Harbach which will protect your 
>> relays, amplifier and transceiver. See <http://w8zr.net/QSK/index.htm>. 
>> This is the best way. Whatever you do, you should read his QST article 
>> that is linked there.
>>
>> If you know that your transceivers provide enough time after asserting 
>> key out and before producing RF, as well as a reasonable delay after RF 
>> stops and before key out goes back to the receive state, then you can 
>> just use a pair of vacuum relays or a vacuum relay and a reed relay to 
>> replace the open frame relay in the TL922. Exactly how you do this will 
>> depend on the coil voltage requirements of the relays that you use.
>>
>> 73,
>> Vic, 4X6GP/K2VCO
>> Rehovot, Israel
>> http://www.qsl.net/k2vco/
>>
>>
>> On 28 Oct 2015 23:04, Arnie Pfingst wrote:
>>> I have a tl 922a with 10m amp driven by a Kenwood ts 940 or Yaesu ft
>>> 950 . It all works great except for the slow change over relay in the
>>> amp. Im using the arb 704 interface for keying. I need a good mod for
>>> the slow relay! After all this time I'm going to order the Harbach
>>> soft start, and filter kit and will adjust the FIL voltage as needed.
>>> Does anybody have any other ideas?ThanksArnie. Kd6cz
>>>
>>> Sent via the Samsung Galaxy S®6 active, an AT&T 4G LTE smartphone
>>> _______________________________________________ Amps mailing list
>>> Amps at contesting.com
>>> http://lists.contesting.com/mailman/listinfo/amps
>>>
>> _______________________________________________
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