[ARC5] Fw: Model 19 MKll

[Henry Mei'l's]

Dennis
Is your transmitting freq 2 kHz off your receiving freq.? -- How do you 
adjust for the difference when you go from receive to transmit anf how do 
you know that your not sending a backwavce 2 kHz away from your key-down 
freq. ?
Henry -OZ1UF

----- Original Message ----- 
From: "Dennis Monticelli" <dennis.monticelli at gmail.com>
To: "Discussion of AN/ARC-5 military radio equipment." 
<arc5 at mailman.qth.net>
Sent: Tuesday, February 23, 2010 9:16 AM
Subject: Re: [ARC5] Fw: Model 19 MKll


> With my T-22 the continuously running oscillator (it runs during receive
> periods as well) does not create a backwave issue because the PA pulls the
> osc about 2KHz upon key down.  Regulation of all voltages eliminates 
> chirp.
>
> Dennis AE6C
>
> On Mon, Feb 22, 2010 at 11:17 PM, Henry Mei'l's <meils at get2net.dk> wrote:
>
>> Hi Meyer and everyone else
>> I used the method of running the a keying (T/R) relay in series with the
>> 1625 cathodes of my ARC-5 xmtrs back in the 50's. It does gives you 
>> cathode
>> bias-but you do lose some power because of the voltage drop, depending on
>> the relay coil resistance- I suppose you could have a pair of contacts 
>> that
>> short out the relay coil when it kicks in- wonder what that would do to 
>> the
>> signal (a kind of burp?).
>>
>> Of course, with the oscillator running, you wont be able to work QSK and
>> you
>> probably will have a readable backwave -- I do when keying the cathodes 
>> of
>> my TCS final, with oscillator and multiplier stage unkeyed -- same with 
>> the
>> ARC-5's  I keyed that way.
>> You all are probably  aware of all this-- so call it nostalgia.
>>
>> 73s, Henry
>>
>> ----- Original Message -----
>> From: "Meyer Gottesman" <wrecktech at yahoo.com>
>> To: "Discussion of AN/ARC-5 military radio equipment."
>> <arc5 at mailman.qth.net>
>> Sent: Tuesday, February 23, 2010 12:52 AM
>> Subject: Re: [ARC5] Fw: Model 19 MKll
>>
>>
>> I stripped the usesless UHF out of my WS 19 also. The 80 and 40 CW
>> performance is FB. As said before, the only nasty element is the CW 
>> keying
>> being at +275 volts. The R/T relay can become the 807 cathode resistor. 
>> If
>> the VFO runs all the time when transmitting and ONLY the 807 cathode is
>> keyed, there should be little or no chirp and I do not recall the drift
>> being too bad.
>>
>> 73,
>>
>> Meyer Gottesman, W6GIV
>> Macon, GA
>>
>>
>>
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