[JMS] What Millen item is this please?
James W Miller
[email protected]
Mon, 01 Apr 2002 08:12:57 -0800
Hi Don,
Tnx for the info about the "impedance matcher". My Millen VFO came with this device
but I did not know what it was used for. The Millen VFO drives my Harvey-Wells
transmitter well without this gizmo. Now I'll have to run some tests on this device.
Tnx for sparking my interest.
73 for now,
Jim, WA2UMP
Don Buska wrote:
> Hi all, I think Gary's correct. That looks like the impedance matcher for using the
> 90711 with high impedance crystal oscillator transmitters. The 90711 is very low
> output impedance. Great for driving coax and even antennas directly. Great QRP
> transmitter, hi. Transmitters like the 90800 were designed for xtal operation thus
> hi-Z when driving a VFO into the crystal socket (grid of osc tube).
>
> I was going to bid on that little baby too, but I thought it closed tomorrow
> morning and not today. Oh well, glad it went to a JMS member. Plus, my 90801
> transmitter was designed for either crystal operation or via the flick of the
> switch on the back panel directly from the low impedance line of a 90711 VFO! How
> nice.
>
> Great going Gary on getting the VFO. Your on your way now!! I have been leaving
> my 711 on all the time now. In fact it's been running non-stop filament voltage
> wise since September. I use the REMOTE VFO control line connected to the
> transmitters PTT circuit. So there is no B+ to the VFO tubes until I flick the HV
> switch to the transmitter. I'd suspect the VFO to be nice and stable after all
> these months, hi. It's a very stable VFO even without going through my extreme.
>
> Also, great news on the article. I was chatting with Barry earlier this week on
> the phone and I was wondering when your article would appear. Barry is very
> interested in our Millen stuff and is always looking for articles guys. I know Jim
> Hanlon has written stuff promoting his Millen equipment. Hopefully someday I'll
> get off my duff and write a few articles on some of the other Millen stuff around
> here.
>
> So John, if you got the little Millen matcher, that's great news. If you ever get
> the time please provide details on the internal construction. Especially the tuned
> coil design. It's a simple circuit and would probably lend itself to easy
> duplication. Plus, it's much smaller than the unit I built up that uses regular
> old transmitting output coils (Junior B&W's). Plus, mine requires changing the
> coil for each VFO band selected. Nowhere near as nice as the Millen unit.
>
> 73 all,
>
> Don N9OO
>
> On Sun, 31 Mar 2002 13:43:01 -0500, Gary Carter wrote:
>
> > Hi Guys,
> >
> > First of all to John - WB5OAU, the ciruit of the tuner/interface unit is
> >pictured at the output in the schematic of the 90711 VFO. It appears
> >that it has more to do with tuning the output of the VFO for the crystal
> >socket input of the transmitter than isolating them from each other. (I
> >could be very wrong on this. I'm still very much a greenhorn with this
> >stuff.) I'm sorry I missed you at the meet because I was looking forward
> >to finally meeting you. I will be at the first CC-AWA summer mini-meet
> >held at the North Carolina Transportation Museum this May or June (no
> >dates yet, I think) so look for me there.
> > Now to John - W4AWM, I picked up the Millen VFO on a pre-arranged deal
> >with my friend John, KA3BRK, so the only time it saw the light of day
> >was during the exchange, hi hi! It looks as if it just came off the
> >production line. John said he replaced the electrolytics and one
> >resistor in it, and said it has a beautiful note. On another subject, I
> >will email you those W1HRX operation photos I promised you awhile back
> >sometime this afternoon. There will be quite a few of them, so give them
> >time to download, hi hi. I had an email from Barry Wiseman this past
> >week, and he said he hopes to put the article I wrote on the W1HRX
> >special event station in the April issue of Electric Radio, so keep a
> >lookout for that!
> > There's no way I'm going to have my Millen station ready in time to use
> >it for the AWA Linc Cundall Memorial OT DX contest this week. I'll have
> >to use my modern Yaesu FT-920 again this year. If you guys are going to
> >be in the contest look for me using the club callsign N4AWA.
> >
> > 73,
> > Gary - WA4IAM
> >
> >
> >
> >
> >john wrote:
> >
> >> Thanks Gary!
> >> Must have missed you at the meet, and I sure didnt see that vfo!
> >> I have one though and I think it's on Dons page. Did you go Saturday or
> >> Friday? Friday was fun but COOOOOL in the shady spot of the lot!
> >> John
> >>
> >>
> >>
> >> At 10:51 AM 3/31/02 -0500, you wrote:
> >>
> >>> John,
> >>>
> >>> I found out this week that it's the tuner interface unit that goes
> >>>between the output of the Millen 90711 VFO and the crystal socket of any
> >>>crystal control type transmitter (90801, etc.). I'm the guy you were
> >>>bidding against (radio_bear), hi hi! I just picked up a mint Millen
> >>>90711 VFO at the CC-AWA meet in Charlotte but it didn't come with the
> >>>tuner unit, so this was the last piece I needed for my Millen
> >>>transmitting station. If I run across another one I'll let you know!
> >>>
> >>> 73,
> >>>
> >>> Gary - WA4IAM
> >>>
> >>>john wrote:
> >>>
> >>>
> >>>>Saw this on E-pay (but didnt bid enough). Whazzit?
> >>>>
> >>>>John
> >>>>
> >>>>http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=1341629626
> >>>>_______________________________________________
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> >>>>[email protected]
> >>>>http://mailman.qth.net/mailman/listinfo/james_millen_society
> >>>>
> >>>>
> >>>>
> >>>
> >>>_______________________________________________
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> >>>
> >>>
> >> _______________________________________________
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> >>
> >>
> >
> >
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