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Bernie....unrelated (somewhat), but <br>
can you post the time/frequency for the Sunday Heathkit net?<br>
<br>
....Dave<br>
<br>
On 5/12/2012 9:30 AM, Bernie wrote:
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<div><font face="Arial" size="2">Please let me add my two cents
(or a quarter's) worth. This HW-101 and power supply that
David went through is now in my hands, and it is truly a sweet
rig. Other than my digitally synthesized rigs (Icom 706 MKII-G
and the Kenwood TS-430S), this HW-101 is more stable than my
Hallicrafters SR-160, or even my Kenwood TS-830s hybrid. I can
turn on the HW-101 from a cold start, find a nice two-sided
QSO on 20 meters, dial it in, and maybe, after 10 or 15
minutes, just touch the VFO to move it 40 or 50 hertz and it's
there the rest of the day. </font></div>
<div><font face="Arial" size="2">I have David's notes on the way
to the post office today, and he will have them in a day or
two and I'm sure he will share with the list-serve anything he
has failed to cover here. The new Jackson drive is superb,
smooth, solid, and a joy to use. </font></div>
<div><font face="Arial" size="2">Now this is the best part. For
those of you on the list-serve group that haven't heard
this...this is the story of how I acquired this super
transceiver. David, W1EUJ, posted up that he had an HW-101
that would like to trade, but not for ham gear or other
electronics. He was looking for something unique, and would be
open to offers for two weeks, after which he would decide who
offered the most unique item or items. Since I am in
northwestern North Dakota, the nation's #1 hot spot for oil
exploration, drilling and production from the newly discovered
Bakken (pronounced bawk'-ken) formation, I offered a pint of
Bakken crude oil. I was amazed when David e-mailed me with his
decision. I sent a bunch of 1.5 ounce miniatures labeled
"Williston Basin Energy Festival, September 2011" along with a
couple of bumper stickers, one saying "Rockin the Bakken" and
the other "Fracturing the Forks". The Three Forks/Sanish
formation lies just 50 to 100 feet below the Bakken and is
actually thicker and larger in size. I also sent "Talkin the
Bakken" a monthly oil patch publication, and of course I'd be
remiss if I didn't send the state's latest North Dakota Travel
Guide. </font></div>
<div><font face="Arial" size="2">In collaboration with David, I'm
preparing to produce a video of the HW-101 in operation for
posting on You Tube, also telling the story of how he
graciously parted with his labor of love, to provide an old
man some real pleasure and enjoyment of operating this
venerable piece of gear. I cannot stress enough the fine job
David did in the restoration of this. It looks factory fresh
(with a few tiny paint chips on the front rim) and runs like a
fine-oiled machine. Lot's of QSO's thusfar, even checking into
the Heathkit Net on a Sunday afternoon and telling "the
story". Hats off to you, David, and thank you. 73</font></div>
<div> </div>
<div><font face="Arial" size="2">Bernie in ND</font></div>
<div><font face="Arial" size="2">WD0GMD</font></div>
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<div style="FONT: 10pt arial">----- Original Message ----- </div>
<div style="FONT: 10pt arial; BACKGROUND: #e4e4e4; font-color:
black"><b>From:</b> <a moz-do-not-send="true"
title="davegoncalves@gmail.com"
href="mailto:davegoncalves@gmail.com">David Goncalves</a> </div>
<div style="FONT: 10pt arial"><b>To:</b> <a
moz-do-not-send="true" title="ve2zhp@yahoo.ca"
href="mailto:ve2zhp@yahoo.ca">Janusz Juryk</a> </div>
<div style="FONT: 10pt arial"><b>Cc:</b> <a
moz-do-not-send="true" title="heath@puck.nether.net"
href="mailto:heath@puck.nether.net">Heathnet</a> </div>
<div style="FONT: 10pt arial"><b>Sent:</b> Saturday, May 12,
2012 4:04 AM</div>
<div style="FONT: 10pt arial"><b>Subject:</b> Re: [Heath] HW-101
VFO</div>
<div><br>
</div>
I think, aside from one thing, this is what I did. I invented
NOTHING here. My theory was that if the best minds in the hobby
couldn't make it work over the last 40 years, that I'd take it
out and replace with a highly filtered DDS VFO.
<div><br>
</div>
<div>Refer to these: <a moz-do-not-send="true"
href="http://www.ultrawebb.com/OHP/SERVICE.htm"
target="_blank">http://www.ultrawebb.com/OHP/SERVICE.htm</a></div>
<div><a moz-do-not-send="true"
href="http://www.ultrawebb.com/OHP/NRWILLIAMSON.pdf"
target="_blank">http://www.ultrawebb.com/OHP/NRWILLIAMSON.pdf</a>
</div>
<div><br>
</div>
<div>0. Replace all resistors with new 1/2W 5% carbon film
resistors (bought good stuff from Digikey), except change R947
to 1k (per service bulletin HW-101-2)</div>
<div>1. Check PN of coil in VFO, change it according to HW-101
service bulletin HW-101-1 (mine did not need this)</div>
<div>2. Change C947 to 47pF NP0 per service bulletin HW-101-19
and C951 to a 10pF N750 per Williamson (I have perhaps ONE to
spare).</div>
<div>3. Install a heavy wire per service bulletin HW-101-27.</div>
<div>4. Hot-glue C946 per service bulletin HW-101-42.</div>
<div>5. Verify that peaking of VFO coil is correct per service
bulletin HW-101-45 and N.R. Williamson.</div>
<div>6. If you find the VFO stops working in CW/USB on the upper
end of bands, change R947 back to 470 Ohms (per service
bulletin HW-101-52).</div>
<div>6. Get the verniers working well. I ended up buying a new
set from Jackson Brothers (see here: <a moz-do-not-send="true"
href="http://www.mainlinegroup.co.uk/jacksonbrothers/4511.htm"
target="_blank">http://www.mainlinegroup.co.uk/jacksonbrothers/4511.htm</a>)
and get Model 4511DAF. Machine the shaft to the length of your
original set, and install for that original 70's feel.</div>
<div>7. Make sure your supplies to the VFO are stable.
Particularly, upsize some of the resistors on the Power board
(I'm getting to those notes soon!!). Make sure to redo your
HP-23.</div>
<div><br>
</div>
<div>That is what I did, and it works very well. I really think
you have to go through the radio completely to really get
everything stable and running sweetly. One could argue that
some of these changes have more impact than others - and given
the difficulty of finding N750 caps one might have to evaluate
that - but I found that all the rest was easy and just did
them all.</div>
<div><br>
</div>
<div>Best of luck, </div>
<div><br>
</div>
<div>David Goncalves</div>
<div><br>
<div class="gmail_quote">On Thu, May 10, 2012 at 11:05 AM,
Janusz Juryk <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:ve2zhp@yahoo.ca" target="_blank">ve2zhp@yahoo.ca</a>></span>
wrote:<br>
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0px 0px 0.8ex; PADDING-LEFT: 1ex" class="gmail_quote">
<div>
<div style="FONT-FAMILY: arial,helvetica,sans-serif;
FONT-SIZE: 12pt">
<div>Greetings everyone,</div>
<div><br>
</div>
<div>I'm rebuilding the VFO from a HW-101 and there
are certain components that need changing. The
crystal diode is one and need to know what
equivalent could be used.</div>
<div><br>
</div>
<div>Cheers</div>
<div><br>
</div>
<div>Janusz ve2zhp<br>
</div>
</div>
</div>
<br>
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<br>
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<div><br>
</div>
-- <br>
David Goncalves<br>
</div>
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