one needs tons of thermal mass plus rapid exchange with the air, use
brick checkerwork or a pebble bed, a standard industrial approach: <
That can be a good way too. How are you going to keep it dry and mold free?
What about the ever present dust?
-Chuck Harris
closet/box your standard occupied at a more stable
temperature.
-Chuck Harris
J. Forster wrote:
Chuck, I don't dispute that you can contain water in plastic a long time,
but, if some does escape it may not matter to the bottle contents, but it
could well raise the humidity of the surround
asins that
have been holding water for decades.
Don't let the fact that water might leak dissuade you from using
it as a cheap highly capable thermal ballast.
-Chuck Harris
Thomas A. Frank wrote:
More to the point, you will be disappointed to find the bottles will NOT
last that long.
ecall hearing anyone make the same claim as you
have, I do have a couple of books on blacksmithing, from the days of
yore, that I will skim to see if anyone observed the same effect.
-Chuck Harris
Rex wrote:
Chuck Harris wrote:
I truly hope you aren't bothered by our rumination. We c
Rex wrote:
Humans are terrible witnesses when it comes to judging lengths of
time, and degrees of temperature. That's probably why clocks and
thermometers were invented.
-Chuck Harris
When I started this part of the thread I said that one of these days I
want to try to make
replaced by a terrifically large conductive
loss of heat.
The extremely quick cooling is why you dunk the bar in water in the first
place.
-Chuck Harris
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lower temperature.
Bruce
Humans are terrible witnesses when it comes to judging lengths of
time, and degrees of temperature. That's probably why clocks and
thermometers were invented.
-Chuck Harris
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urning you than does steel.
-Chuck Harris
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ust the heat of the light bulb.
My environmental chamber will heat up to 70C from just the
heat of the 60W bulb in the chamber.
-Chuck Harris
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Poul-Henning Kamp wrote:
In message <4a30457e.9060...@erols.com>, Chuck Harris writes:
And evaporates and leaks. But yes, I've used water for quick jobs.
I just don't know what to say to that! Even a child can put a
case of bottled water in a box, and not have it evaporate
is for the average Joe to hold water in a bottle without leaks
and other obnoxious behavior for long periods of time, with no
effort.
-Chuck Harris
J. Forster wrote:
Actually, Chuck, I beg to differ. I have some old bottles filled with
essentially water, and the sides are now somewhat squished i
r in a box, and not have it evaporate or leak.
I would venture that said case of bottled water will still be full
up when the child graduates from college, and has kids of his own.
-Chuck Harris
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W/sq-meter.
-Chuck Harris
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, but water is so much easier to find, and easier to
package, plus it has a great storage capability.
-Chuck Harris
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and follow
eration in a civilized
area, it is easier just to try a simple experiment.
-Chuck Harris
Leigh L. Klotz, Jr WA5ZNU wrote:
Chuck,
This device is a pull from a larger system, probably a cell site. It's
clearly designed to be mounted on something, as it has lots and lots of
holes around the edge.
Hi Poul,
I have long espoused that one should never attribute to malice
that which can be more easily explained by ignorance. So, I didn't
believe malice was involved.
I just found your post curious, that's all.
I'm pretty sure that mornings should be banned.
-Chuck Harris
e?
-Chuck Harris
Poul-Henning Kamp wrote:
In message <4a2cfce2.5020...@erols.com>, Chuck Harris writes:
I ran the device today for about half an hour, and used an infrared
sensing thermometer to measure the external case temperature.
Be very careful about trusting this: you need t
cs run hot.
What did the manufacturer suggest?
-Chuck Harris
Leigh L. Klotz, Jr WA5ZNU wrote:
I've attached an SMA connector to my FE-5680A and built an external
linear power supply with a TO-3 7815.
I ran the device today for about half an hour, and used an infrared
sensing thermometer
num tubing... copper would
do fine, as would steel. There is one turn of 5 conductor antenna
rotor cable inside of the loop.
-Chuck Harris
Claude Houde wrote:
Hello !
Here is a follow up on my previous thread on the Austron 2100F.
After getting the unit I found out that the power supply is de
Hi Bill,
I have no direct knowledge of the situation, but I have noticed that
in my area the time signals seem to piggyback on the PBS stations, and
in my area many of the PBS stations have ditched their analog signals
earlier than the FCC mandate for digital TV.
-Chuck Harris
Bill Hawkins
find the 5370B has the same exact sockets
too.
Double sided boards are a treat to work on with desoldering
equipment. Multilayer boards suck up so much heat that they
are a real problem. It helps to cook them on an IR preheater for
a while before removing parts.
-Chuck Harris
Didier wrote:
Hi
I second that suggestion!
-Chuck Harris
Jim Palfreyman wrote:
Now he has some time (hah!) on his hands...get him to join our group!!
2009/5/20 John Miles
Not to mention his work with the 5345A, another perennial favorite around
here. /raises beer
-- john, KE5FX
-Original Message
27;t think it is all *that* special. I have seen the same TI sockets used on
so many different instruments --I would bet more than half the stuff in my
shop has them-- They seem to work more often than not.
-Chuck Harris
Didier wrote:
One is S/N 2128A01306 and the other is S/N 2213A01361, so
t is up
to the task.
It was a major disappointment when the 5370A turned out to be
working well, and in specification. Hopefully it will drift
out so I can put in the differential linearity modification,
and calibrate the beast... in the mean time I will just use
it.
-Chuck Harris
John Miles wro
There is an interesting application note on the differential linearity
issue. Apparently the problem was found by a Tektronix engineer, and HP
provided a correction to fix the problem in the 5370A. That correction,
I believe, is available on Bama.
-Chuck Harris
Pete wrote:
Roy,
The 5370s
a more capable input section than the A.
There is a difference, but the specifications remain the same. I was told
that the difference made manufacture of the 5370B easier. Probably less need
to select parts.
-Chuck Harris
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haps the series your
unit came from.
-Chuck Harris
Didier Juges wrote:
The HP catalog lists the 5370A as capable of 6000 readings/sec in binary
mode, the 5370B is listed as capable of 8000/sec, probably as a result of a
slightly faster processor. Not a significant difference, but there
ts data on HPIB just as fast as the 5370B. The
only difference between the A and B model is they combined the CPU, RAM and ROM
cards into one, and they made some changes to the circuitry to make manufacture
easier.
-Chuck Harris
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or a monolithic
kernel.
-Chuck Harris
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a software radio that uses RTEMS, do the critical
timing stuff in hardware, and the software just manages the hardware.
That's fine, as long as the critical timing stuff never has to
pass into code space. If it does, then you are stuck with the
OS's latency is
the kernel function be small,
and be the only "root" task. Everything else is pushed out
into "user" land.
You do the work in the kernel, or you do the work outside of
the kernel, but you still have to do the work, and that takes
code.
-Chuck Harris
___
Poul-Henning Kamp wrote:
In message <4a0ebdee.2020...@erols.com>, Chuck Harris writes:
A "watch" isn't exactly a challenge to an operating system.
Well, no.
But figuring out correct handling of time is a challenge for operating
system programmers.
Very true...
I
Bob Paddock wrote:
On Sat, May 16, 2009 at 9:21 AM, Chuck Harris wrote:
Bob Paddock wrote:
Anyone ever look at Minix-III (Minix-I was the progenitor to Linux)?
Seems like it would be easy to make a decent time server, on
embedded hardware with it. Past iterations of the Minix-III website
t to power.
Why do you think Minix-III would be a good candidate for a time server?
A "watch" isn't exactly a challenge to an operating system.
-Chuck Harris
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Hi again Didier,
For some examples of really cheap Chinese movements that would
fit in your watch, look at the julesborel site under Miyota. They
have some in the $11 range.
-Chuck Harris
Chuck Harris wrote:
Hi Didier,
My usual source is: http://www.julesborel.com/ Follow the menu
to the
;s, Heuers, etc. for service at their respective factory authorized
repair facilities, and having them come back with quartz movements.
It is much cheaper and easier to do that than to service a watch. For
most people, that isn't a problem, because all the watch meant to them
is wrist jewelry.
you might actually get
a real Seiko movement put back in your watch, but most of the time, you
will get a Chinese knockoff movement that they will glue to the back of
your dial.
-Chuck Harris
As a watchmaker, you can't even open the case for $70.
Didier Juges wrote:
My favorite Seiko watches al
Hi Magnus,
Which biography are you reading?
The last one I read was by Walter Isaacson. It was a very
good story of a very odd man.
-Chuck Harris
Magnus Danielson wrote:
Tom Van Baak skrev:
One of our very own got noticed today on Hacker News:
http://news.ycombinator.com/item?id=598090
as a requirement for issuing your
license, there are elements that can get that too. Talk about giving
out personal information!
-Chuck Harris
I tolerate
participating in a few "yahoo groups" only because I can get limited
functionality (no access to archives) by just using the list
000 other services.
What google did to usenet is provide a portal that spammers find easy
to use. AOL did the same thing... and so did a host of other ISP's.
-Chuck Harris
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addresses, and other things.
At one point they let you have the email addresses if you were logged
in as a google user. I don't use google's deja interface anymore, so
I don't know what they do now.
-Chuck Harris
John Miles wrote:
>> Google didn't do anything to usenet. Th
ause of the success of yahoo groups, and google groups,
and partly because of the risk of hosting any child pornography
that might be passed along on usenet.
-Chuck Harris
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have also lots of memories concerning these
> times.
>
> Neverthelesss it is truly NOT the tool that I use today.
Really? I ditched my newer calculators, and my HP67 is the
only calculator I use now. If I need more power, I use a
computer.
-Chuck Harris
__
o fast PC's, so there might be
a need to buy an older throttled down PC to host your Advin programmer.
-Chuck Harris
>
> Bad news is a refurbed Unisite will set you back $25,000 plus the cost of
> socket adapters and software. Good news is
> with a little shopping around on Eb
Try PRC68.com
Skip Withrow wrote:
> Hello Time-Nuts,
>
> I am in need of a manual for the Austron 2110 Disciplined Frequency
> Standard. Anyone have an electronic copy? I have already tried KO4BB's
> site and BAMA.
>
> I would be more than happy to pay shipping so that I could copy/scan a
Mike Naruta AA8K wrote:
> Not to worry Ulrich, he was using a form
> of derisive humor. He was insulting Prologix
> as undesirable.
Surely, you jest!
He was complaining about PASCAL. A really bad word
among those forced to use it.
-Chu
Steve Rooke wrote:
> This man said the P word without any form of apology :-)
I know, and I am still shaking from the thought of it!
Anybody got a wooden stake?
-Chuck Harris
>>
>> It uses an easy to learn PASCAL like script language that yo
heir CMOS (2.5V) threshold levels, and could only work at
lower temperatures.
Bah!
-Chuck Harris
christopher hoover wrote:
> Chuck Harris wrote:
>
>> They can be very hard to fix, because there is some really poorly designed
>> logic circuitry, and the signature analysis functio
g receiver. The F is virtually
identical... using the same PC boards, just populated less fully.
-Chuck Harris
Claude Houde wrote:
> Hello !
>
> I'm new to the list and I have been offered an Austron 2100F receiver at
> a good price.
>
> Before jumping in, I have a two quest
Great! Keep plugging!
-Chuck Harris
Scott McGrath wrote:
> HI, Chuck
>
> Not dead - just too busy at the office we spoke and scanning is
> proceeding albeit slowly
>
> On Wed, Mar 11, 2009 at 4:12 PM, Chuck Harris wrote:
>> Speaking of such things, has anybody
d
any of them. And I scanned through the lists they had for the various
instrument types without success. Apparently you have found a better
area to look.
-Chuck Harris
Dr. Frank Stellmach wrote:
> Chuck,
>
> I just have found the 5200A manual & addendum here:
>
> http://u
accurate DC calibrators and
> standards, and to my biggest pleasure, they recently scanned all manuals
> of actual and outdated devices.
All is perhaps a little too inclusive. They haven't scanned a single Fluke
instrument from my lab. To w
Speaking of such things, has anybody heard from Scott McGrath,
?
He borrowed my 5065A manual many months ago, to scan, but hasn't
returned it, and doesn't reply to emails.
I would sure like to get it back, and make it available to others
that wanted to borrow it.
-Chuck Harris
Co
I know. Did you read my post?
-Chuck Harris
Stan W1LE wrote:
> Actually it is "duct" tape.
>
> Used to air seal the metal joints in a metal duct work system for heat
> and AC.
>
> New building codes require a mastic paint be applied over all metal
> join
o make sense out of what they hear.
-Chuck Harris
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m the linux users, there is no other way of knowing
how many of us are out there.
Estimates put us at around 29 million.
-Chuck Harris
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e
cover as quickly as possible. With preheat you can move
leisurely, and use a small iron, or hot air gun, to provide
the additional calories needed to melt the solder.
Preheat is best by a long shot. Try it and I am sure you
will agree.
-Chuck Harris
Joseph M Gwinn wrote:
> Chuck,
>
>
ed
to make the solder melt. The net result is usually so nice that you
cannot even tell the foam has even been heated.
-Chuck Harris
>
> I think we are talking about different things. For getting chips off a
> big multilayer board, preheat plus hot air is a standard way to go, but we
comes apart. None the worse for the wear.
-Chuck Harris
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Steve,
This sort of ignorant commentary comes up in discussion with
otherwise reasonable folks so often that it really isn't funny
anymore.
-Chuck Harris
Steve Rooke wrote:
> Wow! Just because I forgot the :-)
>
> Maybe I should have added, leave you sense of humor at home!
. UK tourists are at an extra disadvantage because
their training from birth tells them to look the wrong way for
US traffic. They look to the right for curb lane traffic, and
get hit from the left.
-Chuck Harris
Steve Rooke wrote:
> How about:
>
> Rabies shots.
> Body armor.
> Loa
Magnus Danielson wrote:
> Chuck Harris skrev:
>> One of us is confused about what time_t is... I think it is
>> you.
>
> I know of three different ways to interpret it. They fit different purposes.
>
>> time_t is a 32 bit (depreciated), or 64 bit integer that con
Poul-Henning Kamp wrote:
> In message <4960027e.1000...@erols.com>, Chuck Harris writes:
>> Poul-Henning Kamp wrote:
>
>>>> Ok, that is news to me. Are you saying that (pulling a number out of
>>>> the air) time_t = 21120123 could be followed by 211
is a library function
in most unixes that translates the leap second free time_t into
the leap second adjusted UTC.
Again, are you telling me that time_t is getting adjusted for leap
seconds? If so, when did this change?
-Chuck Harris
Magnus Danielson wrote:
> Chuck Harris skrev:
>
Poul-Henning Kamp wrote:
> In message <495fd637.5030...@erols.com>, Chuck Harris writes:
>
>> Ok, that is news to me. Are you saying that (pulling a number out of
>> the air) time_t = 21120123 could be followed by 21120123 on a year where
>> we added a leap seco
n 1/1/1970... without
regard for leap seconds.
I was of the understanding that the problem was in how the UTC time was
calculated from time_t, and the converse.
Do tell!
-Chuck Harris
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M. Warner Losh wrote:
> In message:
> James Cloos writes:
> : >>>>> "Chuck" == Chuck Harris writes:
> :
> : Chuck> The message implies that linux clocks counted:
> :
> : Chuck> 58..59..60..00..01
> :
> : Chuck> Wh
e implies that linux clocks counted:
58..59..60..00..01
Which would not be the POSIX way.
-Chuck Harris
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. They chose instead to reinvent the wheel, and ignore
most of the advances that came before them.
They still do.
-Chuck Harris
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Bruce Griffiths wrote:
> Chuck
>
> Chuck Harris wrote:
>> n3...@aol.com wrote:
>>
>>> So can any one bring it down a few clicks and explain the accuracy thing to
>>> this balding hippie?
>>>
>>> I'm leaning towards ham radi
mportant, and you start to talk of things like Allen-Variances.
-Chuck Harris
>
> Hope this doesn't start to much controversy on the board.
>
> 73 Chris
>
>
>
> ___ time-nuts mailing list --
> time-nuts@febo.com To uns
t use would it be?
-Chuck Harris
Didier wrote:
> I think you will get a narrow (how narrow will depend on how close they are
> in frequency and how many there are) band of noise centered around 10 MHz.
>
> Didier
___
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Didier,
I wonder what would happen if you took N, uncorrelated and well isolated,
10 MHz sources and added them together?
-Chuck Harris
>
> The cost in complexity for combining oscillators is much more significant
> than for amplifiers. Amplifiers only need phase matching (electrical
lated messages.
-Chuck Harris
Jim Palfreyman wrote:
> Well it seems to work quite well in Australia.
>
> 2008/12/29 Chuck Harris
>
>> Jim Palfreyman wrote:
>>> I suppose it's "nuts" is it to want to live in a society where there a
>> very
>>&
s to believe that a very few guns in the hands of the
police will make you safe. The police, just like everybody else
are prone to being human. They are also prone to having their
possessions (guns) stolen.
>
> I like living in a society like that and I find
er is going
to add up as some fractional power giving you a net improvement
in signal to noise... probably close to 3dB, but not quite 3dB...
I just don't remember anymore.
-Chuck Harris
Didier wrote:
> Chuck,
>
> I am quite familiar with how to calculate a voltage or power ratio in
Really? I would think it would make the papers... but for
some reason, it doesn't.
-Chuck Harris
Mark Sims wrote:
> Unfortunately, in many US cities, getting shot on New Years is an all too
> common occurance. Knuckle dragging idiots celebrate with lots of booze,
> ammunition
io.
2) Convention says that if -dB's are loss, and +dB's are gain, but that
is just convention.
-Chuck Harris
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David M. Witten II wrote:
> Points of pride, I'm sure.
ABSOLUTELY! Freedom was born of guns.
Tyrants are never willing to give it to you
without a fight.
-Chuck Harris
>
> -- Dave
>
> Chuck Harris wrote:
>> And for the ham time-nuts, Hiram Percy Maxim's fathe
And for the ham time-nuts, Hiram Percy Maxim's father invented the
Maxim machine gun. Hiram Percy Maxim invented the firearm silencer.
-Chuck Harris
Brooke Clarke wrote:
> Hi:
>
> The original Time Nut, Alfred Loomis (book: Tuxedo Park) patented:
>
> 1435073 Gun Mount
&
of me figure out how
I could have gotten that impression from what you wrote... Sorry!
-Chuck Harris
Bruce Griffiths wrote:
> I've remembered that I was originally looking for DD Maksutov's article
> on his catadioptric telescope published in 1944.
> Consequently I had a look
pe to adjust the adjustible iron sights.
The WWII records on the M1 Carbine talk of the same technique.
-Chuck Harris
Bruce Griffiths wrote:
> Mark Sims wrote:
>> I got to play with a custom .50 BMG that shoots meaningful groups at 1500
>> meters... the maker's definition of
at it doesn't take longer.
Smile! You will get your t-bolt.
-Chuck Harris
Robert Harmon wrote:
> On Oct 19, I saw on this list an announcement from Tom Van Baak mentioning
> another group buy of the TBolt:
>
>
>
>> Message: 6
>
>> Date: Sun, 19 Oct 2008
Hi Dick,
The T-Bolt is designed to be a turn key system, and is already
set up for the best operation the factory knew how to achieve.
I doubt that anyone has spent much time diddling the time constants.
-Chuck Harris
Richard Moore wrote:
> Dear nuts --
>
> Let me see if I can ask
lt is defined in terms of a
JJ excited by a particular frequency.
Now what we need is a TAPR priced JJ array.
-Chuck Harris
Scott Burris wrote:
> Now that many of us have a nice 10Mhz reference courtesy of TAPR,
> I was wondering if there was any way to use that to build a precise
> voltage
the case with a number of sellers sadly.
If you have ever been on the other side of an ITAR investigation, you
would rightly conclude that it isn't safe to do anything other than scrap
and destroy US surplus materials... which is precisely what they want you
to do.
-Chuck Harris
lt;@><@><@>...
As I understand it, they use a byte stuff code, where any of the "special"
bytes must be doubled if they are in the data And, there must be a
data area length check or you could get into some truly pathological situations.
-Chuck Harris
ed to drive a
3-phase synchro that ran the speedometer (in the front of the bus).
-Chuck Harris
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is what I need.
> The only dowside is that the 602 expects wide range of signals. A pair of
> simple audio frequency gain stages would solve that.
>
> However, currently I am lacking the dot on the screen to begin with. Power
> lines seems OKish but could be trimmed.
midnight can only be estimated.
-Chuck Harris
David C. Partridge wrote:
> Local Solar Time noon would still be 12:00:00.
>
> If I remember correctly, the one that has noon as 00:00:00 is Astronomical
> time (e.g. GMAT).
>
> Cheers
> Dave
> -Original Message-
> From
David Forbes wrote:
> At 9:42 AM -0400 10/30/08, Chuck Harris wrote:
>> With the great ease of computers to make the transformations,
>> there really isn't any point in removing local timezones. It
>> is just a table after all... it is nothing like the old days when
>
t did the study said the number of
heart attacks drops 5% for the 7 days after the US changes from
DST to standard time, and spikes on the Monday we go back to DST.
I expect that the daily risk will be found to shift with the
change in the DST date.
-Chuck Harris
_
Bruce Griffiths wrote:
> Chuck Harris wrote:
...
>>
>> It was recently reported that the onset of DST coincides with an
>> increase in heart attacks, and the return to standard time coincides
>> with a decrease in heart attacks. Yet another reason to ditch
>> Da
heart attacks, and the return to standard time coincides
with a decrease in heart attacks. Yet another reason to ditch
Daylight Savings Time.
-Chuck Harris
Steve Rooke wrote:
> Hi,
>
> I've been under the radar for a while so have not been able to keep up
> with the threads I w
y your design. That is
what the design review process is all about. I have never had to
justify a design to an accountant. I have never met the accountant
that could design circuitry.
Kind of like an engineer framing houses... no, wait, I do that.
-Chuck Harris
sold as a product by
themselves, and there were a lot of receivers that used them. I think motorola
and others thought of them as universal devices but I also think they
thought
of them as disposable, so it isn't clear that they cared if you burned one out
by misapplication.
I have a spa
Lux, James P wrote:
>
>
> On 10/21/08 9:31 PM, "Chuck Harris" <[EMAIL PROTECTED]> wrote:
>
>> Tom Van Baak wrote:
>>>> Both the Trimble and Motorola modules use active antennae with 5V power
>>>> - what I don't know is whether they
Steve Rooke wrote:
> 2008/10/23 Chuck Harris <[EMAIL PROTECTED]>:
>> Matthew Smith wrote:
>>> Quoth Chuck Harris at 2008-10-22 15:01...
>>>
>>>>> I'd be interested to know if any antennas are in fact the other
>>>>> way around
Matthew Smith wrote:
> Quoth Chuck Harris at 2008-10-22 15:01...
>
>>> I'd be interested to know if any antennas are in fact the other
>>> way around. Never even considered that.
>> It would have been fairly trivial for them to put a bridge rectifier
&g
know if any antennas are in fact the other
> way around. Never even considered that.
It would have been fairly trivial for them to put a bridge rectifier
before the amplifier's power stuff, allowing for either polarity.
I always try to do that kind of thing (when I can) in my de
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