[Hammarlund] Re: Hammarlund digest, Vol 1 #249 - 5 msgs
dalphen
[email protected]
Sun, 01 Dec 2002 09:13:58 -0800
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> Today's Topics:
>
> 1. Re: New toy... (Kenneth G. Gordon)
> 2. HQ-180 Noise blanker ([email protected])
> 3. SP-600 Question (Albert Solway)
> 4. Re: SP-600 Question (James A. (Andy) Moorer)
> 5. HCI Sunday Net To Become CW Only (Duane Fischer, W8DBF)
>
> --__--__--
>
> Message: 1
> From: "Kenneth G. Gordon" <[email protected]>
> To: "James A. (Andy) Moorer" <[email protected]>
> Date: Sat, 30 Nov 2002 08:43:28 -0800
> Subject: Re: [Hammarlund] New toy...
> Cc: [email protected]
>
> > Aha! You have one with the GGOD's (Grey Goddesses of Death) rather than the
> > BBOD's. If they are tubular and about an inch long,
>
> Yup! Those are what I see!
>
> > those are the ones. You must
> > immediately put a wreath of garlic over the receiver and lay a cross on it. And
> > whatever you do, don't power it up!
>
> Gotcha! I'll immediately cast runes too, just in case.
>
> >
> > (just my not-so-humble opinion, of course)
> >
> > James A. (Andy) Moorer
> > www.jamminpower.com
>
> Took a look at your lovely SP-600s last night. I must congratulate
> you on (several) jobs well done. Beautiful!
>
> Thanks for the advice.
>
> Ken Gordon W7EKB
>
> --__--__--
>
> Message: 2
> From: [email protected]
> Date: Sat, 30 Nov 2002 20:43:01 EST
> To: [email protected]
> Subject: [Hammarlund] HQ-180 Noise blanker
>
> Good evening all:
>
> Has anyone had any experience with the optional noise blanker for the
> HQ-170/180?
>
> I am curious how much of an improvement it is over a traditional noise
> limiter.
>
> Thanks
>
> Randy Stout
>
Hi Randy
Back when the Noise Blanker was first started to be used t was basically to
get knock out the Russian Radar Woodpecker noise. It is great if there is
short duration noise pulses like spark noise and relay crashing noise. It was
never very good on back ground noise. The one that is best for that is the
IF Noise Limiter. But today the best ay to fight noise if the level is not to
high is DSP. If you live in a area where the noise level is S7 to S9 then all
one can do is find where the noise is coming from. The best place to find
the IF noise limiter is older ARRL Handbook before 1980's. These are great
for the tube set but do not work very will on Solid State. By the way the
circuit that Hammarlund used is in the 1962 ARRL Handbook.
[email protected]
>
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> Message: 3
> Date: Sat, 30 Nov 2002 22:28:48 -0500
> From: Albert Solway <[email protected]>
> Reply-To: [email protected]
> To: "James A. (Andy) Moorer" <[email protected]>,
> "[email protected]" <[email protected]>
> Subject: [Hammarlund] SP-600 Question
>
> James & All,
>
> Need some more advice. James, on your site you refer to 47uF, 450V
> special high ripple capacitors. The only source that I can find for high
> ripple caps is from Digi-Key, their P/N P5951-ND. They are Panasonic EB
> Series. Are these the ones that you use. If not, what is your source.
> Also you have added disk ceramics across the electrolytics. What's the
> purpose. Nice work and the photos are very helpful.
>
> Also in a previous post I indicated that L52 had been overheated and
> that the bottom cover had partially separated from the case. A follow up
> question. The inductance of L52 measure 30HY, required is 20HY. L51
> measures 9.5HY, required is 8HY. Comments please.
>
> Al VE2TAS
>
> --__--__--
>
> Message: 4
> Date: Sat, 30 Nov 2002 19:41:46 -0800
> From: "James A. (Andy) Moorer" <[email protected]>
> To: [email protected]
> Reply-To: "James A. (Andy) Moorer" <[email protected]>
> Organization: Moorer Audio Design
> Subject: [Hammarlund] Re: SP-600 Question
>
> ----- Original Message -----
> > Need some more advice. James, on your site you refer to 47uF, 450V
> > special high ripple capacitors. The only source that I can find for high
> > ripple caps is from Digi-Key, their P/N P5951-ND. They are Panasonic EB
> > Series. Are these the ones that you use. If not, what is your source.
>
> That's them. They are quite rugged. They don't seem to heat up at all in
> operation. They are probably overkill.
>
> > Also you have added disk ceramics across the electrolytics. What's the
> > purpose. Nice work and the photos are very helpful.
>
> Well, they are probably not absolutely necessary. They are .01 at 1000 V.
> They are for additional surge protection and also just to make sure there
> isn't any RF running around in the power supply.
>
> You should put a 'scope on the power supply sometime. It is quite
> interesting - the power supply voltage waves up and down by several (!)
> volts depending on the signal (!!)
>
> >
> > Also in a previous post I indicated that L52 had been overheated and
> > that the bottom cover had partially separated from the case. A follow up
> > question. The inductance of L52 measure 30HY, required is 20HY. L51
> > measures 9.5HY, required is 8HY. Comments please.
> >
>
> Those values are well within bounds. In general, the more the better. The
> cores of those things are made of many iron leaves just pressed together.
> Sometimes after 50 years they fuse a bit which may cause the inductance to
> rise. I don't see any cause for concern unless the resistance has gone up
> sharply. That would indicate frayed or cooked wire to me. Although these
> inductors are pretty sturdy, I have seen them open, but I have never seen
> one that was marginal - it either worked or it didn't.
>
> I might ask how you measured the inductance.
>
> Hope this helps.
>
> James A. (Andy) Moorer
> www.jamminpower.com
>
> --__--__--
>
> Message: 5
> From: "Duane Fischer, W8DBF" <[email protected]>
> To: <[email protected]>
> Date: Sun, 1 Dec 2002 00:01:34 -0500
> Subject: [Hammarlund] HCI Sunday Net To Become CW Only
>
>
> All vintage operators and equipment are always welcome -
>
> Yep, thought that would get your attention! Now that I have it, be there Sunday
> December 1st for the HCI 20 meter Net. The pre-Net starts at 12:45 PM EST, (1745
> UTC) and the Net proper at 1:15 PM EST, (1815 UTC). The frequency is 14.293 Mhz
> usb +/- for key clicks, mike splatter and the pinched shorts pitch of Frogzilla
> practicing his Morse by alternately pinching the neighbor's Cat's tail with his
> electric vise grip pliars.
>
> I hope to hear many of you over the propagation pops and plops from
> precipitation splattering my antennas with a mix of rain, sleet and snow. It
> sounds like bacon frying in a skillet, just does not have that delicious aroma!
>
>
> Duane Fischer, W8DBF
> NCS: Hallicrafters Collectors International
> [email protected]
>
> --__--__--
>
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