[JMS] What Millen item is this please?

Sun, 31 Mar 2002 21:21:01 -0600

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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>
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