[JMS] FW: James Millen night and Project update

[Bob Sullivan]

Don,

I can easily add such a page to the Millen site - it's a good idea.
"Repair and Restoration Tips"

The problem with the 90801 capacitor is a good example - nearly every 90801 
I have seen had this capacitor's ceramic cracked - luckily I could always 
repair with epoxy.

So ... send your tips and hints. Write it like you're writing an article. 
Remember, not everyone knows as much as you - so be concise, complete and 
don't forget the details. :-)

Title (make it relevant - include model number if applicable)
Your name and Call
Text (photos are okay - send them as attachments to your email)

When I have a "handful" I'll prepare and add the page to our Millen site.

73, Bob
WØYVA
Personal site: http://www.isquare.com/personal_pages/ras-hardware.htm


At 09:08 AM 4/6/2006, Don Buska wrote:
>It might be nice to start a "gotcha" page for the website.  A basic list
>for the differing Millen items.  On the 90801 transmitter the plate
>tuning cap is mounted to the chassis and the front also has a locking
>nut to help hold the front panel on.  If you tighten the front nut it
>will crack the ceramic frame on the cap.  The chassis mount attaches to
>the frame and stator plates.  The front panel is part of the rotor
>plates.  When I got my 90801 the cap was damaged.  Lucky for me Ralph
>over at JME had a couple of NOS caps left and I was able to replace it.
>Now that front panel nut is only finger tight.  I always felt that was a
>real non-Millen design flaw!
>
>Note this cap was designed just for the 90801.  You could always find
>another with a similar form factor, but you won't find one with the
>exact capacitance value.  Thus a non-original replacement would result
>in skewed indication on the front panel band markings.
>
>73
>
>Don N9OO
>
>-----Original Message-----
>From: james_millen_society-bounces at mailman.qth.net
>[mailto:james_millen_society-bounces at mailman.qth.net] On Behalf Of
>Dennis & Pat Petrich
>Sent: Wednesday, April 05, 2006 7:09 PM
>To: 'The James Millen Society Members Email Reflector'
>Subject: RE: [JMS] FW: James Millen night and Project update
>
>Hello Clive,
>
>Thanks for the tip on the HV on the plate tuning cap but I found out the
>hard way....  Got a good bite....  Good thing I only had 500v on the
>plates.
>
>Look forward to hearing your 90800 on the air.
>
>73's Dennis, k0eoo
>
>-----Original Message-----
>From: james_millen_society-bounces at mailman.qth.net
>[mailto:james_millen_society-bounces at mailman.qth.net] On Behalf Of Clive
>Oakes
>Sent: Wednesday, April 05, 2006 4:08 PM
>To: The James Millen Society Members Email Reflector
>Subject: Re: [JMS] FW: James Millen night and Project update
>
>Hi Guys
>
>Millen Net is great idea. I am working on a power supply and modulator
>for my 90800 I picked up in Rochester last September. Am building my own
>modulator using an 829B in class AB1 which operates at 600 volts, ie the
>same voltage as the plate modulated 807. This means I can use the same
>choke input power supply for both the 90800 and the modulator.
>
>Caution: Don't let the Knob come the Plate Tuning Capacitor of the 90800
>as the shaft is at 750 volts!
>
>Clive   VE3YB:
>
> >-------------- Forwarded Message: --------------
> >From: myann88 at comcast.net
> >To: james_millen_society-bounces at mailman.qth.net
> >Subject: James Millen night and Project update
> >Date: Wed, 05 Apr 2006 21:30:44 +0000
> >
> >Greetings all!
> >
> >A James Millen night would be great. Count me in!  Latest on my Millen
>project:
> >I gave the rig (Millen 812A amplifier, Millen exciter, Millen 2" scope,
>homebrew LV and HV supplies and 811A Modulator) an RF smoke test.
>Everything works smooth as glass.  I plan to add the modulator and audio
>driver on line within the next week  or two after doing some mods on the
>EICO 730 Speech Amp.
> >
> >Again, a James Millen night or whatever certainly has my attention!
> >
> >Vy 73,
> >Mike Ruggiero, W2NVR
> >______________________________________________________________
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> >
> >
>
>
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