[AMRadio] Eico 722 VFO dial slippage


ronnie.hull ronnie.hull at glowbugs.com
Sat Aug 21 11:53:55 EDT 2004


hello Jim
hey I got your check yesterday and the tubes will go out on monday!!

I'll get it fixed somehow.. I don't discourage too easily!!

R



---------- Original Message -----------
From: "Jim candela" <jcandela at prodigy.net>
To: "Discussion of AM Radio" <amradio at mailman.qth.net>
Sent: Sat, 21 Aug 2004 10:50:22 -0500
Subject: RE: [AMRadio] Eico 722 VFO dial slippage

> Ronnie,
> 
> 	I recall a similar mechanism in the Heathkit VF-1 VFO. These tend 
> to slip over time, and I was not too successful at fixing mine, in 
> fact I chunked it! If yours is similar, and yet not meshing 
> together;  man, maybe it never worked, and was built with the wrong parts??
> 
> 	A rather odd thought occurred to me regarding this, and maybe some 
pulleys
> from an Erector set, and a suitable sized O-ring would do? You can 
> also get a Vernier drive somewhere, and make that work. Sounds like 
> a challenge...
> 
> Good Luck with that VFO!
> 
> Regards,
> Jim Candela
> WD5JKO
> 
> -----Original Message-----
> From: amradio-bounces at mailman.qth.net
> [mailto:amradio-bounces at mailman.qth.net]On Behalf Of James M. Walker
> Sent: Friday, August 20, 2004 10:02 PM
> To: Discussion of AM Radio
> Subject: Re: [AMRadio] Eico 722 VFO dial slippage
> 
> Ronnie,
> I run a 722/720/730 combo on 40 meters. Been using the 722 for about 
> 4 years now. A question, do you have the full manual for the 722, it 
> might shed so light on the dial problem. As for stability, mine is 
> very stable after a ten minute warm-up, if I am going to use the rig 
> I turn it on when I go in the shack, go get a coffee and come back 
> then it is stable.
> 
> I also ordered crystals for the 720, but I found they are high/low in
> frequency, go figure, 7290 xtal is at 7291.5 and 7295 is at 7297.5, hum.
> Good luck with the VFO hope you get it worked out.
> Jim
> WB2FCN
> 
> "ronnie.hull" wrote:
> >
> > well if you ever get an opportunity to pry it out of its case, you will
> see
> > that the dial mechanism is very simple. The knob is hooked to a brass
> shaft
> > that goes straight back, and has a grooved spot on back. Obviously,
> looking
> > at mine anyway.. the edge of the dial itself rides in that groove and that
> is
> > what turns the dial, when you turn the knob. Mine is not riding in that
> > groove, nor can I see any way to make it go back there.
> >
> > thanks
> >
> > Ronnie
> >
> > ---------- Original Message -----------
> > From: "Merz Donald S" <merz.ds at mellon.com>
> > To: "Discussion of AM Radio" <amradio at mailman.qth.net>
> > Sent: Fri, 20 Aug 2004 14:25:52 -0400
> > Subject: RE: [AMRadio] Eico 722 VFO dial slippage
> >
> > > I have one of these but I have not seen this problem. Mine is not
> > > stock--it has a tube change and some modifications around the
> > > changed tube (from QST if I remember right--I have the mod article).
> > > It is quite stable after warm up and completely useable for AM. You
> > > don't hear much about the Eico but I like mine.
> > >
> > > 73, Don Merz, N3RHT
> > >
> > > -----Original Message-----
> > > From: amradio-bounces at mailman.qth.net
> > > [mailto:amradio-bounces at mailman.qth.net]On Behalf Of ronnie.hull
> > > Sent: Friday, August 20, 2004 1:38 PM
> > > To: amradio at mailman.qth.net
> > > Subject: [AMRadio] Eico 722 VFO dial slippage
> > >
> > > I recently became the proud father of a Eico 722 VFO. This little
> > > rig is very very stable for its age. Hell Im impressed!!  Looks good
> > > on the scope too. No A/C ripple in the p/s though it has original
> > > caps. I'm going to change them out just cuz..
> > >
> > > the only problem is has is that the dial adjust knob on the front
> > > will not turn the dial. The dial is edge driven by a spring loaded
> > > brass shaft that has a groove in it that I presume the edge of the
> > > dial sits in. Trouble is, it doesn't. I don't know if its possible
> > > that the dial has shrunk? But..its about 1/32 away from touching the
> > > shaft.
> > >
> > > I can manually turn the dial, and the dial string will move the
> > > variable cap and move the frequency of the unit.
> > >
> > > Does anyone have experience with this rig? and this problem?
> > >
> > > thanks in advance
> > > W5SUM  - Ronnie
> > > ______________________________________________________________
> > > AMRadio mailing list
> > > Home: http://mailman.qth.net/mailman/listinfo/amradio
> > > Help: http://mailman.qth.net/mmfaq.html
> > > Post: mailto:AMRadio at mailman.qth.net
> > >
> > > The information contained in this e-mail may be confidential and is
> > > intended solely for the use of the named addressee. Access, copying
> > > or re-use of the e-mail or any information contained therein by any
> > > other person is not authorized. If you are not the intended
> > > recipient please notify us immediately by returning the e-mail to
> > > the originator.(A)
> > ______________________________________________________________
> > > AMRadio mailing list
> > > Home: http://mailman.qth.net/mailman/listinfo/amradio
> > > Help: http://mailman.qth.net/mmfaq.html
> > > Post: mailto:AMRadio at mailman.qth.net
> > ------- End of Original Message -------
> >
> > ______________________________________________________________
> > AMRadio mailing list
> > Home: http://mailman.qth.net/mailman/listinfo/amradio
> > Help: http://mailman.qth.net/mmfaq.html
> > Post: mailto:AMRadio at mailman.qth.net
> ______________________________________________________________
> AMRadio mailing list
> Home: http://mailman.qth.net/mailman/listinfo/amradio
> Help: http://mailman.qth.net/mmfaq.html
> Post: mailto:AMRadio at mailman.qth.net
> ---
> Incoming mail is certified Virus Free.
> Checked by AVG anti-virus system (http://www.grisoft.com).
> Version: 6.0.742 / Virus Database: 495 - Release Date: 8/19/2004
> 
> ---
> Outgoing mail is certified Virus Free.
> Checked by AVG anti-virus system (http://www.grisoft.com).
> Version: 6.0.742 / Virus Database: 495 - Release Date: 8/19/2004
> 
> ______________________________________________________________
> AMRadio mailing list
> Home: http://mailman.qth.net/mailman/listinfo/amradio
> Help: http://mailman.qth.net/mmfaq.html
> Post: mailto:AMRadio at mailman.qth.net
> 
------- End of Original Message -------




More information about the AMRadio mailing list

This page last updated 17 Dec 2017.