It was nice to see the Elecraft booth at the Raleigh Hamfest. It looked
quite professional and I noticed some folks thought the people behind the
table were employees!
It was especially nice to chat with Don, W3FPR after having read so many of
his posts.
Gordon, KA2NLM
Martin,
Batteries ARE a power supply.
Be safe - particularly when doing testing with a battery supply - they can
produce very large currents (even though only for a short time).
I recommend ALWAYS putting a fuse near the battery terminal of any battery -
even small batteries can produce a very
Wayne,
With only that small amount of difference, you are not likely to encounter
any problem even though your BFO low end of the range is a bit high - yes, a
60 Hz difference with an uncalibrated 4 MHz reference is 'splitting
straws' - you may want to check it later 'just for reference', but as
Are there any decent modern RPN calcs? I had a much loved HP32SII but I
lost it when I moved house and have not been able to find a decent
replacement. I have soft RPN calc on my palm, but I like proper buttons
to push.
Chris - VP8BKF
and it will pring 27! Every modern RPN calculator
I would like to trade my KDSP2 for a KAF2 and $150
shipped. KDSP2 works great; I just prefer the KAF2
for my purposes. Please email directly if interested.
73,
Mark Baugh
W5EZY
Grenada MS
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OOOPS - I had to apologize big time - it was Rick (Tilton) who helped with
the RARS booth, not Rich. My mind to finger linkage wasn't working
properly - or senior momentG. Anyway, here is public apology to Rick.
73,
Don W3FPR
-Original Message-
Sorry we couldn't demonstrate how well
I'm holding on to my HP15C which I bought in college in 1987, still have the
receipt. My boss here was looking for a good RPN calculator and figured he
might find that one on eBay cheap. WRONG! Turns out that very good examples
of it, complete with manual and case are about $300 to $400.
Reminds me of my first, professional, programming job. The Motorcycle dealer
where I worked had an HP-?? (I forget which, but it had a magnetic strip
reader for programming) and I managed to fit a Payroll Tax Calculation
system on one card. Long after I quit that job, I'd get the calculator and
Chris wrote:
Are there any decent modern RPN calcs?...I have soft RPN calc on my palm...
Don't forget Quartus ( http://www.quartus.net ), a complete FORTH
implementation for Palm.
By the way, the on-board computer on the AMSAT/Oscar-40 amateur radio
satellite (may it rest in peace) ran
Hi
I have and use regularly a HP-25 that is about 30 years old. The NiCad
batteries failed many years ago so I mounted a 2.5 volt regulator made with
a LM117 inside the battery box and power it with a wall wart. Once you learn
RPN nothing else seems as easy. I also have a HP-28C and it
HP now makes the HP33s (~$45), which is a slightly enhanced 32sii does
RPN or algebraic. Looks like marketing was at work, though, since they
put the buttons in a strange V pattern. I've also read that the decimal
point is tough to see. And for matrices, differential eqns, etc., you
can now
I still regularly use my HP-11 and have a HP-45 around somewhere,
although if I found it I doubt that I could still buy a battery.
Bob, N7XY
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Hi.
I'm using a modern ANALOGUE multimeter to do the
resistance checks on my KX1. I have performed the
visual
inspection and everything looks good; There were no
problems during construction YET some of the
resistance
checks fail, and I'm wondering what it could be...
U3 pin 3 is 5 ohms ...
Elecraft KBT1 internal battery option $40
Elecraft KSB2 SSB option $85
Elecraft KIO2 RS-232 Interface $85
all unbuilt, and all prices includes conus shipping.
Thanks!
LL/K3ESE
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According to IBM (big Add in Computerworld, when NT came out after Big Blue
and Uncle Billy split over OS/2), in HUGE LETTERS, they proclaimed it meant
Nice Try.
Dan / WG4S / K2 #2456
snip
I thought NT meant New Technology?
/snip
Many software customers I have visited who are Unix fans have
The strip reader was an HP 45. I had that and the HP 35.
Prices were outlandish in those days ( late 50's and early 60's) for a
young engineer.
73
Bill N2DH
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The following is OT commentary on HP calculators, so please delete now if not
interested.
Mark wrote:
I'm holding on to my HP15C which I bought in college in
1987...
I was a junior at Ga. Tech in 1972 when the famous HP-35 appeared. At $400 in
1972, that's about $1800 today. You could
I have a K1 with the ATU and noise blanker. I notice once in a while the
volume will be low.when I turn it on. A simple tap of the key will cause it
to
increase to normal at any volume setting. Then when I am listening it may
decrease again until I tap the key again to bring it to normal.
Bill wrote:
The strip reader was an HP 45. I had that and the HP 35.
The only HP handheld calculators that used magnetic card programing were:
HP-65 - Introduced in 1973 at $800
HP-67 - Introduced in 1976 at $450, replaced the HP-65
HP-41C-series with card-reader option (1979)
The HP-45 came
Jeeez, all you guys are just kids! I cut my teeth on an IBM 650 as a
Stanford undergrad. OS??? Listen, we entered the boot program
through the front panel switch register. The 650 occupied three
large cabinets in a heavily a/c'd room (it was GREAT in the summer!).
2000 10 digit words, plus sign,
I've got an HP-11C and an HP-25, either one of which you'll have to
pry from my cold, dead, hands.
Doug
W6JD
- Original Message : Re: [Elecraft] FORTH - OT
The following is OT commentary on HP calculators, so please delete now if
not interested.
Mark wrote:
I'm holding on to my HP15C
WoW! I've got a couple of 15c's from college days (they were mismarked
at K-mart for a while so I got a spare for something like $20). I see
they're going for $150+ on ebay .. hmm, this could finance my
Dayton/FDIM trip nicely :)
de John/W1RT
___
On 18 Apr 2005 at 12:37, Mike Morrow wrote:
There's something more friendly about a pocket calculator, compared to
?superwhamodyne handheld PC units. But I think it's a dying market. In my
day,
the
pocket scientific calculator was an essential tool of engineering
professionals.
Today,
Then I started studying electronics in the mid 60s with
tube gear.
Reminds me of the time I was an Explorer Scout advisor in the 80's and
one of the kids came up, showed me an old schematic, and asked What's
this funny thing here? It's got an upsidedown T on top, dotted line
in the middle,
If the strip reader was built in you had the HP-65. Later the HP-41
(31?) series had a strip reader as and optional plug on unit. I used
the HP-IL to RS232 converter with my HP41.
Mark
On 4/18/05, Dan Barker [EMAIL PROTECTED] wrote:
Reminds me of my first, professional, programming job. The
I just got back in town from a Long Weekend at the Visalia DX convention. Looks
like we've had a lot of emails on the list this weekend! (It always seems to
happen when I'm off line..)
In any case, lets end this non-K1/K2/T1 etc OT thread for now to relieve the
email pressure on others ;-)
Lets end this one too. :-)
73, Eric WA6HHQ
Elecraft List Moderator
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Thanks to all respondants; the deal has been made.
73,
Mark W5EZY
I would like to trade my KDSP2 for a KAF2 and $150
shipped. KDSP2 works great; I just prefer the KAF2
for my purposes. Please email directly if
interested.
73,
Mark Baugh
W5EZY
Grenada MS
Does anyone of you have experience charging Ni-Mh cells in the KX1? I have
2400 mA/h cells installed and if I am right, a 33 Ohm resistor accross D3,
would charge these cells in app. 10 hours.
I saw Paul W0RW's post awhile ago about his Ni-CAd battery mod. I don't know
or understand very
You qare right!
It was he 65. chaulk it up to old age
73
Bill
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I picked up an XG1 oscillator kit at the Elecraft booth at the DX
convention in Visalia. Assembled it this morning and used it's 50 uV
setting to check the S-meters in my four HF radios with the following
results:
Elecraft K2/100 = S9 (digital S-meter) (S-meter was calibrated by
adjusting the
Elecraft K2/100 = S9 (digital S-meter)
Yaesu FT-1000MP = S9 (main and sub rx's, digital S-meters)
Icom IC-756Pro3 = S9+3 dB (analog S-meter), S9 (digital S-meter)
Kenwood TS-830S = S9+3 dB (analog S-meter) (1 uV setting = S4)
Years ago I calibrated the S-meter in the TS-830S using a
Margaret Leber wrote:
One thing though...I'm certain I heard somebody here on the list
recently who had louder signals with the preamp *off*.
After reworking a couple of suspect joints in the preamp section and
removing and reinstalling T6, the preamp in K2 1641 is now working.
Hello all,
Trevor Boy and myself will hike from Rt.501 to Rt.72 in PA tomorrow. I
plan to operate, but for only an hour or so as we have a twelve-mile
hike. I plan to start my hike at Rt.501 about 8:30am. We will then hike
the four miles to a shelter where we will eat lunch and I will operate
my
Earl wrote:
Elecraft K2/100 = S9 (digital S-meter) (S-meter was calibrated by adjusting
the value of R1 for best AGC action and using the S-meter calibration
procedure described in the manual, i.e., full scale = RF gain fully CCW and
S0 = RF gain fully CW with antenna disconnected -- apparently
Look in the archive. I posted K2 control programs for the HP48 about two
years ago.
Jeff Burns
AD9T
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Daniel Reynolds
Sent: Monday, April 18, 2005 11:03 AM
To: elecraft@mailman.qth.net
Subject: [Elecraft]
Jeeez, Doug, you're just a kid! I was a field engineer installing huge
vacuum tube analog computers (EAI 231R among others) all over the East Coast
and southern Canada. Customers included NASA, Pratt Whitney, Perkin-Elmer
and just every Ivy League and Bush League university in that region.
I am building K2 4856. I've run into a real problem. All tests have gone great
until the VCO Oscillator. In doing the VCO Oscillator Test I get a reading of
0 AND Q1, Q2, Q3 and Q4 on the Control Board all got very hot. Hot to the
touch. Not sure where to go with this one. Any
Jonathan,
I can understand Q1 and Q2 getting hot from a shortcircuit somewhere on the
8T and 8R lines, but I just don't understand how Q3 and Q4 would get hot -
they are just switches and should be fully conducting or fully
non-conducting (and therefore should dissipate very little heat). Start
W3FPR - Don Wilhelm wrote:
I can understand Q1 and Q2 getting hot from a shortcircuit somewhere on the
8T and 8R lines, but I just don't understand how Q3 and Q4 would get hot -
they are just switches and should be fully conducting or fully
non-conducting (and therefore should dissipate very
Ron, AC7AC wrote:
Someone I was chatting with recently said he had tested the S-meters of
several receivers and found that 1 S-unit can equal anything from 3 dB to
more than 6 dB. I had always assumed the target was 6 dB/S-unit.
Apparently not so.
==
Years ago, there were two standards
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