[TenTec] Ten-Tec 229A Tuner Value

[Jim Allen]

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 at 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 at audiosystemsgroup.com>
> To: tentec at 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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