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Re: [Amps] Weakness of first two letters of call signs

Subject: Re: [Amps] Weakness of first two letters of call signs
From: "" <>
Date: Tue, 6 Oct 2020 14:51:34 GMT
List-post: <>
Hi Alex,  
When using an amp in semi-break in, it is quite common for the first dit or dah 
of each transmission to be shortened due to hot switching of the slow Amp T/R 
relay.  The slow T/R relay causes shortening of the first character of each 
transmission.   This is especially bad with starting dit's  which makes the 
first dit sound weak (i.e. W, A, etc.).  

On some transceivers this can be corrected by increasing RF delay.  Others 
require something like a QSK-2500 to provide the needed delay.
.... Bill K3HZP
      DX Connection

---------- Original Message ----------
From: Alek Petkovic <>
Subject: Re: [Amps] Weakness of first two letters of call signs
Date: Tue, 6 Oct 2020 18:44:59 +0800

Yes. I think it is true. That's why, if I get asked for a repeat of my 
call, I will send it at least twice, without a large gap, so that the 
second time it is sent at full steam. That usually does the trick.

I run the inward QSL bureau for VK6. I see a lot of cards come in for 
VK6FO. Funny thing is, that VK6FO does not exist. The cards are actually 
for 4K6FO. I have heard 4K6FO on the air and it is true, the first dit 
is extremely hard to pick up because it seems to be sent at lower strength.

I don't pretend to know why this stuff happens, I only wanted to concur 
with you and say that it definitely does.

73, Alek, VK6APK

On 6/10/2020 6:24 pm, Jeff in Mali: via Amps wrote:
> In my pileups, I find that people often send their call signs only one time. 
> Most call signs are of the form XX#YY or XX#YYY. By the time their sending 
> gets to the #, their signal is strong enough so that I can copy the rest of 
> the call.
> i am wondering if it is a common property of amplifiers that they take a 
> finite time to reach full power and that as people send their call sign, the 
> first couple of letters are being transmitted at less than full power?
> Do people in the group have any experience with this phenomenon, or is it 
> just my imagination?
> I try to get people to send their call 3 times (QSZ 3), but someone has 
> convinced a lot of operators that once is enough.
> 73,
> Jeff TZ4AM
> _______________________________________________
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