I heard LA5HE
but couldn't break the pileup with 5W so I tuned around a bit. When I came back he'd gotten stronger, but 5W didn't do it (at least the first time) and as it was getting late I turned on the HFPacker amp
and got in the second time. Rag
gave me a 539
and I returned 579
. Lars is in Telemark
(Norway) and said he'd been to Palo Alto several times. K2, HFpacker amp
, SteppIR 40/30 as dipole
I heard VK3AMA
) on 14.071.6 PSK31.
I got a QRZ for 5W and a 449
for my 25W
from my K2
and HFPacker Amp.
I sent 579
because of some flutter or other propagation issue. Laurie has been a ham since 2006
My HFpacker amp got quite not; not sure why.
I worked FO/N6JA>
again at 0637Z this time on 7.001.4 CW
, again with 15W
N6KR on the 2n7000
This message to the old lehigh-hosted QRL-L disappeared from the web when the last remaining archive of the old list turned off access. It is reproduced here as Wayne requested initially, and also separately
Subject: 2N7000's: important information
From: email@example.com (Wayne Burdick)
Date: Tue, 17 Oct 1995 21:47:01 -0800
This is important reading for designers and kit builders about a component
that has recently become popular in QRP circles. [Please publish
widely--QRPp, "72", etc.]
The 2N7000 is a DMOS MOSFET transistor that is great for switching uses: it
can be used just like an NPN transistor, but requires no current-limit or
bias resistor at the base lead (its gate lead draws no current). In fact,
in the TO-92 package, its leads are in the same order as a bipolar
transistor: S-G-D correspond to E-B-C.
BUT: this part *IS* subject to static damage. Before you handle one, sit
down and touch the nearest metal surface that is grounded (rig, scope
ground lead, etc.).
Both the Cascade (NorCal) and the KC1 (Wilderness Radio) use 2N7000s.
Wilderness guarantees that their 2N7000 transistors are good when they go
into the anti-static bags, and after that it's up to the builder. 99% of
the time, you won't have a problem even if you handle them improperly (see
story at the end of the article). It's the 1% I'm trying to eliminate.
I can't speak for NorCal's packing of the Cascade, but I know Doug
Hendricks was careful when he packed them. (On the other hand, Dave
Meacham confirms that there have been some failures of this part in the
Cascade, and there have been a couple in KC1s as well. You can bet the
next revisions of both manuals will include more anti-static precautions.)
Anyway, this is a very useful part that won't go away, so here are some
strongly recommended guidelines:
1. NEVER buy surplus 2N7000s or similar parts unless they are still on or
in their protective anti-static shipping material. Loose parts in bins
must be 100% tested before use.
2. NEVER remove them from the shipping material until you're properly
grounded. It is then OK to put them into anti-static bags but NOT into
ordinary plastic bags.
3. If you suspect one is bad, you can tentatively substitute a 2N2222A or
other NPN transistor for it in many cases, BUT you must add a resistor
(typically 10K) in series with the base lead. This is necessary because in
most circuits, the 2N7000 is driven directly by things like microprocessor
output pins, and you'll fry the NPN transistor without base current
Now, just to confuse the issue, here's an amusing counter-example:
When I designed the 2N7000s into the KC1, I attempted to do "destructive
testing" of one of the parts. I held a 2N7000 loosely in my hand, scuffed
my feet around on carpet, rubbed the part on my cat, shocked myself on the
sliding glass door transistor-first, and other things too horrible to
mention. Then I put it back in the circuit. It still worked! Perhaps
some of the parts are better than others! After all, they are made by more
than one manufacturer.
Hope this clarifies the use of these devices. Assume the worst, despite my
good luck with one of them.
I heard VR10XLN
talking to a UA0 and then calling CQ on
and answered him but another UA and I both tried. I let
the other OM have a chance and when it didn't work I answered again,
from my K2
and SteppIR. Clive
to an OMANT: Dipole from his QTH in
Hong Kong, Western Side
. Clive gave me a 559 QSB
} and I
Clive's regular call is VR2XLN
I heard Pedro HK3JJH
on 14.241 SSB
and he answered me the first time in the pileup with my 10W
to the SteppIR
. I got 5x6 5x7 QSB and gave 5x9+20. Pedro is on Bogota, Colombia.
I just turned on the KX1
and SlimGem 10W amplifier
and heard HA9RU
) on 14.014
with the 66ft OCF doublet
up 6 meters
. OM heard me the first time but it took a couple of tries to get the call right.
If you use HamTest Online
and have accidentally clicked on the wrong answer while moving the mouse around, you have experienced what psychologists call motor error
. It's easy to do because they have both the radio button and the label as clickable. I have written a tool for FireFox to change the way it works. See HamTestOnline Clicker
for installation instructions.
K2 and K3
Eric WA6HHQ of Elecraft is showing the K3 at the PAARA meeting.