[Milsurplus] TS-234A/UP

[Jim Whartenby]

FrancescoI wonder how non-inductive the resistors actually are?  This would limit the upper frequency that one can safely use.  I believe what limits the upper frequency of most dummy loads is actually the detector network used to measure input power.  Do you have a tiny VNA for testing the resistor network?Jim
Logic is a systematic method of coming to the wrong conclusion with confidence.  Murphy

On Tuesday, August 18, 2026 at 11:50:30 AM CDT, Francesco Ledda <k5urg at yahoo.com> wrote:

Well, my TS-234A is indeed 50 ohm! It has 4 large 200 ohm resistors. There are no signs of manumission and looks original.  I am as puzzled as you probably will be. If interested, I can forward a picture of the inside. 
Best, Francesco K5URG
Sent from my iPad

On Aug 17, 2026, at 19:15, Jim Whartenby via Milsurplus <milsurplus at mailman.qth.net> wrote:



16 ohms is 1/3 of 50 ohms so it might be possible that there are 3 each 50 ohm @ 425 watt elements in parallel.So it might still be useable as a standard 50 ohm load at reduced power.Jim
Logic is a systematic method of coming to the wrong conclusion with confidence.  Murphy

On Monday, August 17, 2026 at 03:58:47 PM CDT, frledda at att.net <frledda at att.net> wrote:


Thank you, all!

  

From: milsurplus-bounces at mailman.qth.net <milsurplus-bounces at mailman.qth.net> On Behalf Of hwhall--- via Milsurplus
Sent: Monday, August 17, 2026 3:51 PM
To: k5urg at yahoo.com; milsurplus at mailman.qth.net
Subject: Re: [Milsurplus] TS-234A/UP

  

Can we post images here? Let's see.

  

Wayne

WB4OGM

  

On Monday, August 17, 2026 at 02:14:20 PM MDT, k5urg at yahoo.com <k5urg at yahoo.com> wrote:


  

Hi All,

 

I have here a dummy load labeled TS-234A/UP.  It says 1275W, but does not specify the frequency range.  

 

Does anybody have a spec of such thing that can share with me?

 

Thank you!

 

Best, Francesco K5URG

______________________________________________________________
Milsurplus mailing list
Home: http://mailman.qth.net/mailman/listinfo/milsurplus
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Milsurplus at mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

______________________________________________________________
Milsurplus mailing list
Home: http://mailman.qth.net/mailman/listinfo/milsurplus
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Milsurplus at mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
______________________________________________________________
Milsurplus mailing list
Home: http://mailman.qth.net/mailman/listinfo/milsurplus
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Milsurplus at mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/pipermail/milsurplus/attachments/20260818/46570942/attachment-0001.html>