[ARC5] "Curing Chirp in Command Transmitters"

WA5CAB--- via ARC5 arc5 at mailman.qth.net
Tue Oct 7 03:28:38 EDT 2014


Glen,

You're correct, of course.  That was a typo that I hadn't even noticed 
until your reply.  I meant 1626, not 1629.

Robert Downs - Houston
wa5cab dot com (Web Store)
MVPA 9480

In a message dated 10/06/2014 10:59:34 AM Central Daylight Time, 
gzook at yahoo.com writes: 
> Forgive me, but the 1629 tube isn't even needed to operate the 
> transmitter when the heaters are rewired for 12-volt operation and, if the proper 
> resistor is added across pin-2 and pin-7, to compensate for the current draw 
> of the 1629 heater, or the value of R-71 changed to accomplish the 
> compensation, then running with the original heater wiring works without the 1629 
> being installed.
> 
> Having the frequency calibration verification in operation doesn't affect 
> the using the transmitter to emit a radio frequency.
>  
> Glen, K9STH 
> 
> Website: http://k9sth.net
> 
> On Monday, October 6, 2014 12:53 AM, WA5CAB--- via ARC5 <
> arc5 at mailman.qth.net> wrote:
> 
> Glen,
> 
> I'm sorry, but your statement isn't technically correct.  Someone 
> yesterday 
> or the day before (I'm sorry but I didn't pay any attention to who posted 
> it) already explained this.  Go back and read it. Plus the cathode bias on 
> 
> the 1629 will be screwed up and modulated at 60 CPS.
> 
> In a message dated 10/5/2014 6:20:36 PM Central Daylight Time, 
> arc5 at mailman.qth.net writes: 
> >Whether or not the heaters run from AC or DC doesn't really matter.  The 
> >tubes have indirectly heated cathodes which are independent of the heater 
> 
> >voltage source.
> >
> >Glen, K9STH 
> >
> >Website:  http://k9sth.net
> >
> >
> >On Sunday, October 5, 2014 6:13 PM, AKLDGUY . <neilb0627 at gmail.com> 
> wrote:
> 


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