[Drake] 2-NT VFO Choice

[Bry Carling]

Dennis - be sure to let us hear you Drake 2NT and the Knight 50 Watt Transmitter in the upcoming
February Novice Rig Roundup!!
73 - Bry AF4K

http://NoviceRigRoundup.com

> Date: Sun, 28 Feb 2016 21:51:26 -0800
> From: dennis.monticelli at gmail.com
> To: kd2e at comcast.net
> Subject: Re: [Drake] 2-NT VFO Choice
> CC: drake at mailman.qth.net
> 
> One thing I will add to the list of criteria for a good VFO to drive simple
> rigs is the sub-harmonic content.  Some of the vintage VFOs are better than
> others with regard to this.  It is important because the tanks of the rigs
> being driven are essentially low pass networks (simple Pi) and sometimes
> the oscillator section offers little in the way of selectivity.
> 
> For example I used a Knight VFO on a Knight T-50 and fed it into a spectrum
> analyzer.  I did not like what I saw sub-harmonic wise and decided not to
> run the setup stock.  My plan is to add some easily removable internal or
> external passive filtering to the output of the VFO.
> 
> Dennis AE6C
> 
> On Sun, Feb 28, 2016 at 2:49 PM, Dave Edwards <kd2e at comcast.net> wrote:
> 
> > FYI...My 2NT owner's manual has a page added by Drake, mentioning that
> > Drake does "not yet" offer a VFO, but
> > suggest the Hallicrafters HA5.
> > The Heath would work, but....I'd put it several down on the list.
> > The Globe, Eico, Lafayette.....I would select first.
> > ....Dave
> >
> >
> > On 2/26/16 10:05 AM, Bill Stewart wrote:
> >
> >> Hi Herman,
> >> Thanks for your input. The HA-5 is getting several 'votes'. I can see why
> >> it might
> >> be pretty stable, with the LF osc and heterodyne scheme. So far, I think
> >> the HA-5
> >> will be first on the want list, and maybe a HG-10B in second place, even
> >> tho it does
> >> not have an internal p/s. Of course, the list is subject to change.
> >> Tnx.....
> >> 73 de Bill K4JYS
> >>
> >> ----- Original Message -----
> >>
> >> From: N4ch at aol.com
> >> To: bmarx at bellsouth.net, cwopr at embarqmail.com, Drake at mailman.qth.net
> >> Sent: Thursday, February 25, 2016 7:20:03 PM
> >> Subject: Re: [Drake] 2-NT VFO Choice
> >>
> >>
> >> Hello Bill......
> >>
> >> If you want something stable (other than these new synthesized VFOs that
> >> are showing up new all over the place), and want something from the 60s era
> >> that's mostly tube-type, keep a lookout for a Hallicrafters HA-5. They're
> >> pretty rare, but quite stable (they're pretty unique for a 50+ year old,
> >> stand-alone VFO, in that they use a circuit that heterodynes a relatively
> >> low frequency L-C oscillator with crystal oscillators). Think they're about
> >> the same size as the "T.O." keyers.........same styling, too. Seems like
> >> they have 3-4 tubes, and a built-in power supply, which is solid-state, I
> >> think. I've never tried pairing one up with a 2-NT, but I'd think they
> >> should work pretty well together. Good luck.
> >>
> >> 73, Herman, N4CH.
> >>
> >>
> >>
> >> In a message dated 2/25/2016 5:22:22 P.M. Eastern Standard Time,
> >> bmarx at bellsouth.net writes:
> >>
> >> The Heathkit drifted like crazy but the Johnson while drifty also was OK.
> >> I just sold my 2NT/C combo, and the receiver was every bit as nice as
> >> the 2B, which I still have and love it.
> >> Bill W2CQ
> >> PS I got a Pink ticket from the FCC, for calling CQ DX out of the band
> >> with my Heath VFO...50 kilocycles out! I wasn't even close.
> >>
> >>
> >> On 2/25/2016 3:49 PM, Bill Stewart wrote:
> >>
> >>> Good afternoon,
> >>> Just wondering what vintage VFO would be suitable for the Drake 2-NT.
> >>> Curious about any that would be stable and easy to hook up...self powered
> >>> would be a plus and no solid state (except possibly the rectifiers).
> >>> Thanks.....73 de Bill K4JYS
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