Well, you made me think, but it turns out, you are right. The CAL FIL
display says t for the 2.20 setting, but it's really using OP1. However,
with the alignment done on 2.20 and transmit done on OP1, the filter will be
very off, and the ripple is extreme.
My 2 year old KSB2 seems OK in the
Dan,
The 't' is on the BFO display corresponding to FL1 - and its only meaning is
that this is the BFO (carrier) frequency that will be used for transmit.
73,
Don W3FPR
- Original Message -
Well, you made me think, but it turns out, you are right. The CAL FIL
display says t for
The option of OP1 or 2.2, etc in the filter selection is for receive only.
However you still have to make sure that the BFO is place correct for the TX
filter OP1 and the easiest way to do that is to set up with OP1 in FL1 on
receive as was finally selected and match the BFO to that with
Hi Dan.
Another idea.
Why not some sort of RF-probe circuit? It would look just like the RF probe
in the book, but with different component values to get the time constant
down. The RF probe in the book gives about a 100 Hz bandwidth which isn't
enough (I'd want at least 5K for SSB audio
. I must have known that because I said it wouldn't work for CW,
but I just had to try.
Thanks anyhow.
Dan
-Original Message-
From: John Magliacane [mailto:[EMAIL PROTECTED]
Sent: Friday, November 12, 2004 10:22 AM
To: Dan Barker; Elecraft
Subject: Re: FW: [Elecraft] How to set up SSB
On Fri, 12 Nov 2004, John Magliacane wrote:
Hi Dan.
A simple, low gain, direct conversion receiver (oscillator, mixer, audio
amplifier) will provide the necessary carrier injection (BFO) for proper
audio demodulation.
You can likey throw together a pixie style rx in less than 20
- Don Wilhelm [EMAIL PROTECTED]
Subject: Re: [Elecraft] How to set up SSB
To: Dan Barker [EMAIL PROTECTED], Elecraft
elecraft@mailman.qth.net
Message-ID: [EMAIL PROTECTED]
Content-Type: text/plain; format=flowed; charset=iso-8859-1;
reply-type=original
Dan,
You could try using
Nigel and all,
I hope I have not caused any confusion, BUT ...
I have been refering to the classical filter 'corner frequency' as the -3 dB
point, which does place the upper 'physical corner' seen on the display at
400 to 500 Hz. Perhaps I should change my text to clarify.
73,
Don W3FPR
I've just gotten my MH2 working again with a RadioShack 270-090 element. I
have no idea if that's the right part, but it appeared identical to the Heil
part, and the o'scope says about 120 mV p-p when I talk normally (Measured
at pin 5 of the SSB adapter - should be the same as mic connectory pin
Dan,
You could try using the microphone direct into a tape recorder if the mic's
response is the primary question.
If you are referring to filter adjustments to match your voice, I think more
emphasis than necessary has been placed on refining the frequency range. If
you have set your FL1
10 matches
Mail list logo
