[Boatanchors] T/R switch question _ 221122_follow-up

[Richard Knoppow]

    Using separate antennas may give you safe levels in the receiver if 
separated by a long enough distance. Actually, pretty far. Even if at a 
reasonable distance you are likely to get overloading and 
desensitization of the receiver. As far as the limit of power in the 
receiver you can take a chance if you want but input coils for older 
receivers are not easy to find. I had to for my AR-88 because the coils 
for the two top bands were fried.
    Another point about your technique, you are using two different 
kinds of antennas. They have different performance. Well, the commercial 
stations did that but they also mostly used duplex with R and T on 
different frequencies.
    All of this sounds like wishful thinking to me.
    Now, why do you want break-in, are you planning to handle heavy 
traffic?
     I just think you are asking for trouble without getting much 
benefit in return.

On 11/24/2023 4:04 PM, Rob Atkinson wrote:
> You can operate full break-in with a separate rx and tx antenna with
> no problem at the Ranger power level.   I did it for years with a
> Knight T-60. I received with an inverted V and transmitted with a
> horizontal random wire going out away from the inverted V.  My
> receiver was an Allied solid state general cov. receiver made for them
> by Trio I believe.  The front end coils on old tube receivers can
> usually  handle more voltage than modern sets.   I think Collins gives
> a maximum front end specification somewhere for the A-Line.  I
> remember that for 50 ohms it was a surprisingly high power level.  Not
> real high but more than I expected.  But, replacing such a coil is
> difficult.  I would put some separation between the antennas like
> around 40 or 50 feet and keep the Ranger output power down to 40
> watts.  A lot of CW QSOs can be had with 40 watts.
> 
>>      A second antenna will not give you "break-in" by itself, if that is
>> what you want.
> 
> I don't see why not.  I left my old Allied rx on my tx frequency and
> could copy between my dits and dahs no problem.
> 
> 73
> Rob
> K5UJ

-- 
Richard Knoppow
Los Angeles
WB6KBL
SKCC 19998