[heathkit] zero beat

["larry allen" <larya@rogers.com>]

Greetings....
It does sound like hams have modified the hr-10 from what I remember it's 
operation to be....
My congratulations on the mods / upgrades....
Larry ve3fxq

----- Original Message ----- 
From: "Alan Beck" <becka@eastlink.ca>
To: "heathkit List Member" <larya@rogers.com>
Sent: Tuesday, May 27, 2008 6:16 AM
Subject: [heathkit] zero beat


> So,
>
> The rx-mod pot allowed you to set your TX up AND use the RF Gain wide
> open.
>
> So, that would be what? a fixed Resistor in series and open to
> experimentation.? I do have one, I think. I have many 10 watt 1.2K
> resistors.
>
> You are right My sigs are loud.
>
> I could use the XTAL calibrator as a reference signal.
>
> All tubes are now NOS except the 6EA8 (2 of).
>
> I have one 6EA8, but it unbalances the RX and causes it to go nuts.
>
> The only real variables are a STBY switch and the contacts on the dowkey
> relay. I guess the tube I need is another NOS 6EB8.
>
> I guess I am dreaming up an order.
>
>
> Best 73
>
> Alan
>
> Deoxit would come in handy too.
>
> On Mon, 2008-26-05 at 20:47 -0400, larry allen wrote:
> > My first transmitter was the dx-60, as well, ... my first receiver was 
> > the
> > gr-91... general converage receiver...My second receiver was the
> > hr-10...My vfo was the hg-10....
> > When you are adjusting the rf gain, you are as I recall, in effect,
> > pulling the receiver's tuning slightly...
> > I would go the other way... set the rf gain to peak and then adjust the 
> > af
> > gain appropriately... If the signal is too strong, pull back on the rf
> > gain but once you find the right setting leave it....
> > You could also be suffering from a weak tube.... which is allowing the
> > pulling effect...
> >
> > It has been a long time since I used my dx-60 hr-10... mid 60's...
> > I remember I muted the receiver, gr-91, by installing a potentiometer
> > between the cathode of the rf tube and ground and adjusted the control 
> > for
> > best reception of a very strong signal.. mine...
> >
> > It is quite possible I did the same thing with the hr-10.. modifying 
> > the
> > front end to make is so insensitive that it could only hear me.. when I
> > went back to receive the mod was shorted out...
> >
> > Larry ve3fxq
> >
> > ----- Original Message ----- 
> > From: "Alan Beck" <becka@eastlink.ca>
> > To: "heathkit List Member" <larya@rogers.com>
> > Sent: Monday, May 26, 2008 4:18 PM
> > Subject: [heathkit] zero beat
> >
> >
> > > OK,
> > >
> > > I have a question.
> > >
> > > When I was using my DX-60/HR-10 station, I would call someone and 
> > > then
> > > shift the BFO to match.
> > >
> > > The reason for this was that I could barely  hear my VFO in the RX.
> > >
> > > The manual states that to operate the receiver, I have to set the AF 
> > > to
> > > 1/4 and use the RF Gain to adjust volume.
> > >
> > > However, when I do this, the frequency shifts slightly.
> > >
> > > When I key down, I really have a lot of signal that it makes a sort 
> > > of
> > > ripping sound and peaks out the meter, one side stronger than the 
> > > other.
> > >
> > > So, I go for the peak on the highest side. When I check the small
> > > signal, it is way off frequency.
> > >
> > > Anyone have a bullet proof technique to do this one.
> > >
> > > BTW, I am using a dow-key relay and muting the RX during full 
> > > transmit
> > > mode.
> > >
> > > Alan
> > >