Isn't it true that heating means less than optimum efficiency...... all that
power heating the tuner instead of putting fire in the wire?
73 de W6OGC Jim Allen
Sent from my iPad
> On Feb 17, 2016, at 19:25, Clayton Brantley via TenTec
> <tentec@contesting.com> wrote:
>
> Jim: The 229/238 will run at legal limit for quite a while on almost all
> bands. The problemrears it's head on 160 meters where you might run into
> some weird mis-matches. At lowpower it seems to work OK but at hight power,
> the .01 disc caps just cannot handle the
> current. I found some Russian caps for around $30 to replace the stock caps.
> Now my229A remains quite cool. I believe this thing will tune the
> proverbial wet noodle in a copperbox! I have had several match boxes over
> the years and I will not part with this one.
> If you do not use 160 meters, then this mod is un-needed.
>
> 73 Clayton N4EV
>
> From: Jim Brown <k9yc@audiosystemsgroup.com>
> To: tentec@contesting.com
> Sent: Wednesday, February 17, 2016 6:14 PM
> Subject: Re: [TenTec] Ten-Tec 229A Tuner Value
>
>> On Wed,2/17/2016 9:46 AM, Gary H. Harmon, Jr. wrote:
>> Is there a written mod somewhere about replacing the caps and which ones?
>
> I've seen recommendations to replace all of the fixed caps with
> doorknobs. That's a bit of overkill. :)
>
> I ran my Ten Tec 229 and 238 tuners at legal limit, and there were
> several caps that eventually blew. I don't remember exactly which ones,
> but I do remember one that was at the rear of the bandswitch. I'm using
> surplus HV caps with relatively low temperature coefficients (N750 or
> N330), low ESR (equiv series resistance) and high current handling. The
> caps I use came from browsing the aisles at this surplus house. It's
> unlikely that you can do any good online.
>
> http://www.halted.com/
>
> 73, Jim K9YC
>
>
>
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