Don, Ed, Wes, et al,
Thanks, guys, I misspoke. I was thinking of the old multiplicative
CW-only designs that have been floating around, but of course, the
Elecraft ones don't do that. My bad.
Yes, it would be nice to sync the Elecraft transverters to a 10 MHz
signal.
Which ones do you guys hav
Dave,
Pretty much no-issue if using the transverter interface at mw level
as that causes no heating in transmit. TCXO-3 plus EXREF keeps 28
MHz within 2-Hz* and that is additive to transverter freq error not
multiplicative. Xtal LO in UHF transverters are typically multiplied
so using good
Of course I know that. Mine was a rhetorical question.
On 1/23/2019 6:08 PM, ab2tc wrote:
Hi,
It doesn't "compound". A 10Hz drift at the antenna output of the K3, will be
reflected as a 10Hz drift at the output of any transverter, be it VHF, UHF
or microwave. At the higher frequencies even a t
I've never had a drift issue with any of my modern transceivers on 28MHz as the
IF. Now the TCXO drift in the transverters is real issue.
Bob, K4TAX
Sent from my iPhone
> On Jan 23, 2019, at 7:08 PM, ab2tc wrote:
>
> Hi,
>
> It doesn't "compound". A 10Hz drift at the antenna output of the
Hi,
It doesn't "compound". A 10Hz drift at the antenna output of the K3, will be
reflected as a 10Hz drift at the output of any transverter, be it VHF, UHF
or microwave. At the higher frequencies even a transverter with an OCXO its
drift would probably dominate.
AB2TC - Knut
Wes Stewart-2 wrote
Dave,
Put the external reference oscillator input option on your K3 and avoid
that situation with an external 10 MHz reference oscillator.
The K3 Reference Oscillator temperature steering is from the static
temperature offsets. If you have equipment to do better than the Data
Sheet, you can
You should be subscribed to Timenuts.
But clearly one of us is confused. If you're using an OCXO in your transverter
and up converting the K3, how does K3 drift/inaccuracy "compound" at UHF?
Can you read that watch to 50 ms? What are you going to do when WWVB goes QRT?
Wes N7WS
On 1/23/201
> Are you serious?
> Wes N7WS
Wes,
Yes. I'm a stickler for accuracy. It always bothered me that the
so-called 'temperature compensated' LO in the K3 was not actively being
steered by temperature compensation (i.e. I could only put static
temperature offsets into the rig memory from the dat
Thanks, Wayne! This is one of the best entries into these threads I’ve ever
read. And, yes, I've experimented with Auto Spot in CWT mode.
And: > “the Audio Peaking Filter (APF), …provides a 30-Hz bandwidth at -3 dB,
but broad skirts, preventing ringing from occurring. As our customers will
at
I must admit, most of my CW tuning is done with the P3/SVGA and
getting the pitch "right" in my earphones. (With RTTY, I can get
very close to the correct pitch by ear. Then I used the crossed
loop tuning aid for the final few Hz.)
73 Bill AE6JV
---
For N1MM, use the up and down arrow keys to get close in S&P operation and then
press F11 to zero beat -
F11 Z B,{CATA1ASC SWT42;}
If it is a dense pile, a little XIT offset is a big help.
73,
Bob R
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On 1/22/2019 14:14, Bob McGraw K4TAX wrote:
Another trick which works well. Tune to a WWV frequency in CW mode.
Press SPOT and the radio will jump on the exact carrier frequency.
You can do the same thing, of course, by listening to the beat between
the sidetone and the carrier. I was able
Hi all,
Agreed; the problem can easily be solved in analog radios without frequency
synthesis by offsetting the BFO frequency by those 700Hz or so in transmit.
In down conversion machines with a single IF in the 8-9MHz range that could
easily be done by pulling the BFO crystal. The Drake TR4 undou
Are you serious?
Wes N7WS
On 1/22/2019 1:45 PM, Dave New, N8SBE wrote:
Don't know how i did without it all these years...
73,
-- Dave, N8SBE
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Help: ht
I'm a great fan of using the auto-spot feature, and love to show it off
to all shack visitors, as an example of yet another reason they need to
upgrade to Elecraft, from whatever boat anchor they are still using...
73,
-- Dave, N8SBE
__
years...
73,
-- Dave, N8SBE
Original Message
Subject: Re: [Elecraft] Auto-spot, tuning aids, and the arcane history
of CW pitch-matching
From: Bob McGraw K4TAX
Date: Tue, January 22, 2019 3:14 pm
To: elecraft@mailman.qth.net
Another trick which works well. Tune to a WWV frequency
] Auto-spot, tuning aids,
and the arcane history of CW pitch-matching
Back in my college days at W9YT, we had a Drake line, separate
transmitter and receivers. When searching and pouncing in a contest, you
had to spot the transmitter before every contact. Spotting required
turning one of th
In that era, SSB capable transceivers often offset the BFO by using a
different BFO crystal for CW transmit or CW receive - but that technique
slaved you to one sideband and one CW pitch.
There were other ways of doing the offset as well, but it was usually
done by shifting the BFO frequency.
Another trick which works well. Tune to a WWV frequency in CW mode.
Press SPOT and the radio will jump on the exact carrier frequency. The
SPOT function can pull on to the WWV frequency as far away as about 100
Hz. Once the radio has resolved SPOT, the readout / display is the
frequency
--
73 Chris Cox, N0UK, G4JEC
chr...@chris.org
On Tue, 22 Jan 2019, K9MA wrote:
> transmitter before every contact. Spotting required turning one of the rotary
> switches on the transmitter, a cumbersome process. Imagine doing that a couple
> thousand times in a weekend. At some point, we came
The transceive problem didn't seem to exist on any older non-synthesized
transceiver that I have used, including FT-101 series, TS-520/820 and
later, KW Electronics KW-2000E. these were all '70s era transceivers.
--
73 Chris Cox, N0UK, G4JEC
chr...@chris.org
_
On 1/22/2019 10:59, David Gilbert wrote:
Wayne, you forgot clicking on the DX Cluster spot. ;)
Everyone zero beat was, I think, a bigger problem before skimmers.
Skimmer spots often seem to be quite a ways off frequency, probably
because their SDR receivers aren't all that stable. Some may b
Back in my college days at W9YT, we had a Drake line, separate
transmitter and receivers. When searching and pouncing in a contest, you
had to spot the transmitter before every contact. Spotting required
turning one of the rotary switches on the transmitter, a cumbersome
process. Imagine doing
Wayne, you forgot clicking on the DX Cluster spot. ;)
I'm being facetious, of course, but the practice of simply clicking on a
cluster spot does point out a problem with zero beating by any means ...
if every calling station is zero beat the station calling CQ isn't going
to copy anyone.
Z
Yet another trick learnt by hard experience given away for free :-(
Regards,
Mike VP8NO
On 22/01/2019 11:14, Nr4c wrote:
Now, one thing you missed... when you’re working a big pileup and you feel you
just can’t get through, it may be that all your “buddies” are doing the same
thing, using A
Wayne, thanks for this historical description. I have used these tools myself
a lot over the years. They are one reason I have purchased my K3, K3S and
KX3(however sold to purchase K3S).
Now, one thing you missed... when you’re working a big pileup and you feel you
just can’t get through, i
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