[R-390] VFO end point off 17 KHz

[comcast]

dave
try surplus sales of nebraska.   i see in their online caralog they have a 15 mhz hc6u for $20. 
jeff kg2bz

Sent from my iPhone

> On Nov 2, 2019, at 2:12 PM, Perry Sandeen via R-390 <r-390 at mailman.qth.net> wrote:
> 
> Mouser sells a variety of crystal configurations and some are the HC-6U(?) physical package.  15 MHz will (likely) be a 3rd overtone.  They are cheap enough if the one you'd buy won't work on all the overtones needed another one might.
> Regards,
> Perrier
> 
>    On Saturday, November 2, 2019, 6:48:25 AM PDT, David Olean <k1whs at metrocast.net> wrote:  
> 
> Hello Mr. Bottled Water, (Perrier)
> 
> OK on all the advice. It sure does sound like there is something wrong, 
> but with ferrites that are 50+ years old, you can get some significant 
> drift too. I have an old 144 MHz Tecraft xmtr from my boyhood that had 
> all the slugs drift so far down that it stopped working. I had to modify 
> all of the multiplier coils to get it back on 24 and 72 MHz.  That is a 
> pretty drastic change.  That is what prompted me to diddle with the end 
> point coil. So now it is working great with nice linearity across 950 
> kHz and only 500 Hz off at one end.  I'll come back to this problem 
> soon.  Getting the PTO out is sorta simple, so I will order some new 
> capacitor parts and come back to it on some cold winter night. In the 
> mean time, I am re aligning the entire set and fixing a few problems. 
> The carrier meter has stopped working and the RF gain control is acting 
> funny. This R-390A had the antenna relay removed and an (ugh) SO-239 
> connector installed in its' place. I just bought a relay and am looking 
> for the wires to re install it, but can't find them ?  I am not sure, 
> but think they must have been clipped and removed. I'll run new wires to 
> the rectifier and get it all working.
> 
> I also found that the 15.000 MHz crystal has died.  This only affects 
> the 27 MHz band.  It will not oscillate, or if it does, it is very weak. 
> I need a replacement crystal. I found a 7.500 MHz one in my junque box 
> and it actually works, but output is a bit low and injection is not 
> enough.  Fair Radio does not list any. I am looking for a replacement.
> 
> If anyone has a Cosmos PTO I would be interested in getting another one 
> to work with as well.  They do get addicting.
> 
> 73 Dave K1WHS
> 
> 
>> On 11/2/2019 5:42 AM, Perry Sandeen via R-390 wrote:
>> Yo Bubba Dudes!,
>> I agree about returning the end point coil to its original 3 turns.  I disagree with fixing the drift with adding caps.
>> W