I may have mis-stated the RF Choke problem.... it was a self resonance problem.
The burnt choke is just tightly wound, while later chokes have sections of
tight winding connected by sections of wide spaced spirals...
--------------------------------------------------
From: "Rich Hallman - N7TR" <rich@n7tr.com>
Sent: Sunday, July 12, 2009 9:14 PM
To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Subject: Re: [TenTec] Titan 425 RF Choke Replacement?
> This happened on 15 meters...but I noticed it was tuning weird on 20
> meters as well. Since this was the last series to be built...I would
> have assumed it has the latest updates. Maybe not....
>
> Rich
>
> -----Original Message-----
> From: tentec-bounces@contesting.com
> [mailto:tentec-bounces@contesting.com] On Behalf Of CSM(r) Gary Huber -
> AB9M
> Sent: Sunday, July 12, 2009 7:04 PM
> To: Discussion of Ten-Tec Equipment
> Subject: Re: [TenTec] Titan 425 RF Choke Replacement?
>
> I lost the RF Choke on my Titan 425 shortly after I purchased it April
> 1990. It is an early export model. Ten-Tec sent me a replacement choke
> which I installed. Unfortunately one of the tubes was damaged,
> necessitating a return to Ten-Tec. They replaced both tubes and put in
> "upgrades" to the then current production specs under warranty. As I
> understand it, early 425 RF Chokes did have a problem with parasitic
> currents.... mine failed the first time I attempted to tune it up on 15
> Meters after working for weeks on 20 CW. No problems since.
>
> Best regards,
>
> CSM(r) Gary Huber - AB9M
> 9679 Heron Bay Rd
> Bloomington, IL 61705
> (309-662-0604)
> www.csm-gh.com
> glhuber@msn.com
> gary.huber@us.army.mil
>
> --------------------------------------------------
> From: "Rich Hallman - N7TR" <rich@n7tr.com>
> Sent: Sunday, July 12, 2009 7:27 PM
> To: <tentec@contesting.com>
> Subject: [TenTec] Titan 425 RF Choke Replacement?
>
>> Has anyone had to replace their RF Choke on a 425? Mine burned up
> this
>> weekend in IARU and need to replace....If you did replace the choke,
>> what did you get ? RF Parts RFC-3 or does TenTec have these in-stock?
>> Any known issues with these...? This was from one of the Golden
> Series
>> last version Titan 425's.
>>
>>
>>
>> Thanks...
>>
>>
>>
>> Rich N7TR
>>
>> ex KI3V, N3AMK, WB3JOV
>>
>> www.n7tr.com <http://www.n7tr.com>
>>
>> Telnet: dxc.n7tr.com N7TR DXCluster
>>
>>
>>
>> _______________________________________________
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>> TenTec@contesting.com
>> http://lists.contesting.com/mailman/listinfo/tentec
>>
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