[ARC5] [Milsurplus] TCS RF ammeter or thermocouple replacement

[Henry Frederick "Meils" Meiseles]

Yes, I've used TCS  for years by just loading via the plate current but I 
would like
to get the RF Ammeter going again instead of it just staring at me, one 
eyed,
begging me to do something! Just dismounted it, judging from burred slots on 
the tiny emplacement
screws, this meter's been worked on before. The terminal bolt nuts, flush 
against the bakelite/presumanbly
thermocouple base/are VERY firmly tightened. I've repaired several meter 
movements
before, but have never "resurrected" a thermocouple.

Had and still have another burnt our RF Ammeter but I didn't see how I was 
going to get at the thermocouple
bulb without shattering the glass  -- maybe they can function w/o being in a 
vacuum - that is if
the thermcouple can be repaired as someone else one list says they can..




JFOR -- my thought, too that since it shows some reading, it's
not totally hopless -- I could also just multiply the readings by about 
four!.


Well what do you know , TCS_Radios at yahoogroups.com ! Thanks for that!


Henry, Cph.

----- Original Message ----- 
From: "mac" <w7qho at aol.com>
To: "Henry Frederick Meils Meiseles" <meils at get2net.dk>; 
<TCS_Radios at yahoogroups.com>
Cc: <arc5 at mailman.qth.net>; <milsurplus at mailman.qth.net>
Sent: Wednesday, May 25, 2011 7:02 PM
Subject: Re: [Milsurplus] TCS RF ammeter or thermocouple replacement


> Don't let a bad RF ammeter keep you from using the radio, though.   Just 
> tune and load it up using the PA plate current meter like you  would with 
> a Viking 2  or any of the many other ham HF rigs that never  included RF 
> ammeters.
>
> Dennis D.  W7QHO
> Glendale, CA
>
> *****************
> On May 25, 2011, at 8:54 AM, Henry Frederick Meils Meiseles wrote:
>
>> I need a repalacement for my TCS RF ammeter -- or perhaps just the 
>> thermocouple, if that is replacable.
>> Of course I could always make a makeshift RF output readout using a 
>> diode (WS-19 style) and self- calibrate a panel meter (putting in a  new 
>> face on the original or an other meter)  but prefer to keep the  original 
>> meter.
>>
>> I haven't opened the meter yet to take a closer look at the how the 
>> thermocouple is mounted -
>> I assume that once a thermocouple is overloaded, it's not reparable.  I 
>> do have other thermocouples
>> of another type, which I could use and calibrate a new dial face --  
>> again losing
>> the original installation.
>>
>> My TCS-12 RF Ammeter hardly budges, even under heavy RF currents.  The 
>> problem  appeared many years ago, probably, if I remember  correctly, a 
>> result of drawing too much current while matching an  antenna using an 
>> external variable capacitor across the RF output. I  haven't used the rig 
>> in many years but now wish to reactivate it --  also remember that the RF 
>> Ammeter on my GF-11 had to be treated with  caution.
>>
>> If anyone has an extra TCS RF ammeter/thermocouple unit, please let  me 
>> know.
>>
>> Thanks in advance,
>> Henry oz3o, n2nr
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