[Heathkit] HW100 transmitter alignment

[Bob, WB2VUF]

I don't know about the driver adjustments but they are tricky. The coils
have to be adjusted in exactly the sequence specified in the manual
because they are wired in a series and parallel configuration.

My HW-100 built in 1970 has the same bias current characteristic. Don't
worry about it.

Yes, I always had to run the mike gain at about 3 o'clock to get
adequate drive and ALC action. There is a mod to get more drive:

Replace R202, which brings drive from V3 to V5A with a jumper or a short
piece of shielded wire. This helps a lot and it is an official Heath
mod. The resistor runs on the top between the bandpass and driver
boards, if I recall correctly.


				73,
				Bob WB2VUF


"R.J.Keller" wrote:
> 
> I completed the alignment with only one problem. First, here are the
> power out/current readings: Keep in mind that these are older finals
> and both are 6146B's. I have new A's which shoud improve power out on
> 15/10M as well as make neutralization easier.
> 3.7 130W/210ma,
> 7.2 120/210
> 14.2 100/200
> 21.2 60/175
> 28.2 60/225
> 28.7 60/225
> 29.2 20/225
> 29.7 20/225
> 
> As you may notice, I get 60W on 28 and 20W on 29, but to get that I
> had to align the driver grid/plate on 28.2 instead of 29.2 as it calls
> for in the book. Is this normal for the driver grid and plate coils to
> be so selective?
> 
> Also, from day one when I built the rig back in '70, the mike/cw level
> does not respond until it gets around to about 1 to 2 o'clock.
> This is not too important since the rig tunes fine but just curious if
> that is the norm.
> 
> Has anybody noticed that the idle plate current (bias) is higher in
> TUNE than when the mike is keyed? Just a little bit but I set it with
> the mike keyed. It's not a big deal, again, just curious.
> 
> 73, Dick KF4NS
> 
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