Re: New poll for ham_amplifiers
Peter I would like to see a schematic of that one. Funny?I was just looking at the specs of the 4cx350. I'm not sure if?I want to build an IPA of drive the grid. GG is very stable but needs a lot of drive. I can do class A and get 1500 watts out with 100 watts of drive but more drive is required for QRO. (my viking 2 is a good driver for AM mode) gfz
Peter Voelpel wrote:
Funny, the YC-156 TRIODE has 3 times that gain in GG. I drive my grid driven 4CX3000A by a 4CX350a in
class A which I integrated into the amp 73 Peter --- In ham_amplifiers@yahoogroups.com, FRANCIS CARCIA wrote: > > I never tried driving the grid but in gg it is close to X15 when motivated by a pair of UTC CG310s on the high taps. I've read your article a number of times on the on you did Rick. Frank wa1gfz > > R L Measures < r@...> wrote: In grid-driven service, the 4cx3000A has a power gain of c. 60x. > > On Sep 20, 2006, at 4:51 PM, FRANCIS CARCIA wrote: > > > Yup Mike, > > They all went to Frank because I have a box of 4CX3000As. They also > > work well in GG mode and have a bit more gain than the 4-1000A. > > wa1gfz > > > > Mike Sawyer wrote: > > Frank, > > I thought
I took all your 4-1000's ;>) Welcome to the new group. > > Mod-U-Lator, > > Mike(y) > > W3SLK > > ----- Original Message ----- > > From: FRANCIS CARCIA > > To: ham_amplifiers@yahoogroups.com> > Sent: Wednesday, September 20, 2006 5:32 PM > > Subject: Re: [ham_amplifiers] New poll for ham_amplifiers > > > > Maybe we could change the pole to what size breaker can you > > trip.......I plea the fifth > > > > ham_amplifiers@yahoogroups.com wrote: > > > > Enter your vote today! A new poll has been created for the > > ham_amplifiers group: > > > > what is the output power capability of your HF power amplifier. > > (obviously we never exeed our legal limit) > > > >
o < 2 kW > > o 3 kW > > o 6 kW > > o 12 kW > > o > 15 kW > > > > To vote, please visit the following web page: > > > > > > Note: Please do not reply to this message. Poll votes are > > not collected via email. To vote, you must go to the Yahoo! Groups > > web site listed above. > > > > Thanks! > > > > > > > > > > R L MEASURES, AG6K. 805-386-3734 > r@...>
|
Fw: Step Start on a 3KA Amp
toggle quoted message
Show quoted text
----- Original Message ----- From: "PA3DUV" <pa3duv@...> To: "Harold Mandel" <ka1xo@...> Cc: <amps@...> Sent: Thursday, September 21, 2006 1:39 PM Subject: Re: [Amps] Fw: Step Start on a 3KA Amp Thats right Harold.
But when one switches the amp on the switching of the triac can be heard on the HF transceiver.
However, this is not really an issue since it disappears in approx. 2 seconds. I haven't heard of any problems with this softstarter so I guess it is a technically sound solution.
At least in my twin GU84B amp with 3 phase power supply the 3 softstarters (one per phase) perform very well.
Cheers, Dick
PA3DUV
----- Original Message -----
From: "Harold Mandel" <ka1xo@...>
To: "'PA3DUV'" <pa3duv@...>
Sent: Thursday, September 21, 2006 1:26 PM
Subject: RE: [Amps] Fw: Step Start on a 3KA Amp
Dick,
I think the Emtrons are zero crossers.
Pat Stein uses them in the Commander series, too.
The amp never makes a thump when it's switched on,
not like the Alpha clone that makes the floor jump.
Hal
Ian,
A picture of the Emtron switched mode softstarter + schematic diagram are
available at:
I've heard that Emtron is selling their softstarter as a seperate item.
This softstarter is a small switcher which chops the AC voltage, by doing
so limiting the inrush current.
Cheers, Dick
PA3DUV
|
Re: Censorship/Administrator
Perhaps the thread should be retitled "Irresponsible conjecture revealed."
73 and QRT de N4ZR
.At 03:24 AM 9/21/2006, Jan Erik Holm wrote:
toggle quoted message
Show quoted text
Bill Fisher W4AN committed suicide on April 4 2004.
You can read here:
73 Jim SM2EKM
--------------------------------------------------------------
R L Measures wrote:
W4AN was not a fan of free speech - RE: W4AN & free speech: After Bill Fisher died at such a young age,
I tried to find out how it happened. I could find out nothing from
the County Coroner. Rumor was that there was an automobile accident,
that the car landed in water a considerable distance from the
highway, and that it happened near a drag-strip in Georgia. My guess
is that the Coroner's Report was suppressed because the toxicology
finding would have been an embarrassment.
he replaced me as Admin of
Towertalk when I refused to censor posts there; this is not a knock on
Bill, just a difference of philosophy.
Yahoo! Groups Links
|
Yeah, and he's here now. G'day from downunder. 73, Alek VK6APK At 09:35 AM 21/09/2006, R L Measures wrote: chortle
On Sep 20, 2006, at 2:06 AM, w5uc wrote:
The mesage got through anyway. VK6APK posted a respomse with the
announcement at the bottom and the censor missed it.
73,
Mike, W5UC
Yahoo! Groups Links
R L MEASURES, AG6K. 805-386-3734
r@...
Yahoo! Groups Links
|
Re: Censorship/Administrator
Bill Fisher W4AN committed suicide on April 4 2004.
You can read here:
73 Jim SM2EKM
--------------------------------------------------------------
R L Measures wrote:
toggle quoted message
Show quoted text
W4AN was not a fan of free speech - RE: W4AN & free speech: After Bill Fisher died at such a young age, I tried to find out how it happened. I could find out nothing from the County Coroner. Rumor was that there was an automobile accident, that the car landed in water a considerable distance from the highway, and that it happened near a drag-strip in Georgia. My guess is that the Coroner's Report was suppressed because the toxicology finding would have been an embarrassment.
he replaced me as Admin of
Towertalk when I refused to censor posts there; this is not a knock on
Bill, just a difference of philosophy.
|
Fw: [Amps] Step Start on a 3KA Amp
toggle quoted message
Show quoted text
----- Original Message ----- From: "PA3DUV" <pa3duv@...> To: "Ian White GM3SEK" <gm3sek@...>; <amps@...> Sent: Wednesday, September 20, 2006 9:27 PM Subject: Re: [Amps] Step Start on a 3KA Amp Ian,
A picture of the Emtron switched mode softstarter + schematic diagram are available at:
I've heard that Emtron is selling their softstarter as a seperate item. This softstarter is a small switcher which chops the AC voltage, by doing so limiting the inrush current.
Cheers, Dick
PA3DUV
----- Original Message -----
From: "Ian White GM3SEK" <gm3sek@...>
To: <amps@...>
Cc: "Bob Maser" <bmaser@...>
Sent: Wednesday, September 20, 2006 11:33 AM
Subject: Re: [Amps] Step Start on a 3KA Amp
Bob Maser wrote:
Please remember that this thread started by me asking about a step
start in a 30+ year old amplifier from Henry, the 3KA. There are a lot
of things that could have been done differently in this amp but it is a
rock solid amp that will put out the legal limit and then some all day
long. Could someone point us to a schematic, please? (BAMA doesn't have it.)
--
73 from Ian GM3SEK
_______________________________________________
Amps mailing list
Amps@...
|
Re: Censorship/Administrator
very much so.
?
Mr. Rauch just censored my reply to the Henry 3KA
Step Start subject which I've posted to Ian White GM3SEK and the
group.
?
It seems that the hand of doom of the AMPS censor
will follow me for ever ;-))))))))))))))))
?
Since I think my contribution might be of interest
to other AMPS members I will post it on the AMPS bypass list and this
group.
?
Cheers, Dick
PA3DUV
?
?
?
?
toggle quoted message
Show quoted text
----- Original Message -----
Sent: Thursday, September 21, 2006 3:01
AM
Subject: Re: [ham_amplifiers]
Censorship/Administrator
On Sep 20, 2006, at 11:29 AM, Dino Darling wrote:
> My guess
is that Pete won't get banned from here, if that was what he
> was
implying. If he chooses not to post here, it will be of his own
> free
will. at least, this is my understanding of policy on this new
> and
improved list.
>
> I wonder who else has been banned from the
other list in the past
> week...
Probably no one. Apparently Tom
has been quietly censoring AMPS
members who mention this
group.
>
> At 04:45 AM 9/20/2006, you wrote:
>
>>
This may be my first and last post on this list, but I wanted to
>>
clear
>> a few misconceptions:
>
> Dino - K6RIX
>
dino@...
>
>
>
--
> No virus found in this outgoing message.
> Checked by AVG
Anti-Virus.
> Version: 7.1.405 / Virus Database: 268.12.5/451 - Release
Date:
> 9/19/2006
>
>
>
>
>
>
Yahoo! Groups
Links
>
>
>
>
>
>
>
>
>
>
R
L MEASURES, AG6K. 805-386-3734
r@...
|
Re: [-] Re: Re: Panasonic/Matsushita Switcher HV-PS u-Wave Oven
Beyond installing your ECBS and parasitic suppression kits in an SB-220 and a Henry 2K-3 (both worked very well, thank you), the most serious project I have undertaken in the last 40 years is to take a perfectly good Alpha 76A and install a pair of 3CX800A7's in it and modify it for QSK.
Normally, my moto is "If it works, don't fix it." The 76A modification was a serious violation of my moto.
However, the thought of a light weight high voltage power supply for my Alpha does have an appeal, especially when I would like to take it on DXpeditions and international airlines are almost to the point of weighing baggage by the ounce.
de Paul, W8AEF
toggle quoted message
Show quoted text
----- Original Message ----- From: "R L Measures" <r@...> To: <ham_amplifiers@...> Sent: Wednesday, September 20, 2006 5:22 PM Subject: Re: [-] Re: [ham_amplifiers] Re: Panasonic/Matsushita Switcher HV-PS u-Wave Oven
On Sep 20, 2006, at 4:01 PM, Paul Playford wrote:
It is information like this that maintains my interest in amateur
radio. Are you interested enough to build one?
My guess is that 6 of the Panasonic switchers would power an 8170 in
SSB-mode, especially if an energy-storage C bank was connected to the
output and the units were powered from a 50A electric range outlet.
|
Mike\(W5UC\) & Kathy\(K5MWH\)
I got so tired of the long term kicking of
dead horses that I just started going through my unread mail and automatically
clicking AMPs mail as read without opening it or looking at the subject.? I
should have left long before I did.? When I saw the announcement about
this reflector, I joined it and unsubscribed to AMPS, then deleted all AMPS
messages and the AMPS mailbox from my system.? God knows that I enjoy a
little fun & BS, but I was having trouble finding boots with high enough
tops.
?
73,
Mike, W5UC
?
From:
ham_amplifiers@... [mailto:ham_amplifiers@...] On Behalf Of R L Measures
Sent: Wednesday, September 20,
2006 9:13 PM
To: ham_amplifiers@...
Subject: Re: [ham_amplifiers] Re:
Moderator
?
On Sep 20, 2006, at 5:26 PM, Mike((W5UC)) & Kathy((K5MWH)) wrote:
> The absence of secret moderators is a blessing. Now if we can just
> avoid month long discussions about the miniscule merits of harmonic
> suppressors.
The are parasitic oscillation suppressors but no harmonic
suppressors. Did you avoid discussions about the latter?
>
>
> Pentalabs wrote:
>
>
> To thrive, like a TV soap opera, a discussion group needs a
> protagonist and an antagonist. Tom and yours truly are such. Without
> Tom, my guess is that there will be a lot less entertainment value.
>
>
>
>
R L MEASURES, AG6K. 805-386-3734
r@...
|
On Sep 20, 2006, at 5:26 PM, Mike((W5UC)) & Kathy((K5MWH)) wrote: The absence of secret moderators is a blessing. Now if we can just avoid month long discussions about the miniscule merits of harmonic suppressors. The are parasitic oscillation suppressors but no harmonic suppressors. Did you avoid discussions about the latter?
Pentalabs wrote:
To thrive, like a TV soap opera, a discussion group needs a
protagonist and an antagonist. Tom and yours truly are such. Without
Tom, my guess is that there will be a lot less entertainment value.
R L MEASURES, AG6K. 805-386-3734 r@...
|
Re: Censorship/Administrator
It's also funny that when I asked on the amps reflector if Rich had been
kicked off, Tom wrote back to me the reasons he was kicked off for, before it
ever showed up on the reflector that he was gone. The admin guy didn't answer me
until the next day.? If the admin guy is not Tom, then he must be helping
the admin guy censor.?
toggle quoted message
Show quoted text
----- Original Message -----
Sent: Wednesday, September 20, 2006 6:29
PM
Subject: Re: [ham_amplifiers]
Censorship/Administrator
On Sep 20, 2006, at 8:45 AM, Mike((W5UC)) &
Kathy((K5MWH)) wrote:
> Pete, I guess you do what you think you must
do, BUT, I have a lot?
> of trouble with the idea that someone
operates an ¡°open¡± forum and?
> feels the need to hide.? That
concept really bothers me.? I post my?
> name and callsign
every time I post to a reflector, and I am very?
> suspicious
about the intentions of someone who feels the need to?
> hide in
the shadows.
Amen, Mike.? I found it curious that Tom knew the
reasons why I got?
"unsubscribed" / jackbooted from AMPS without the
reasons having been?
posted.
>
>
>
73,
>
> Mike, W5UC
>
>
>
>
>
>
From: ham_amplifiers@yahoogroupscom?
> [mailto:ham_amplifiers@...] On Behalf Of Pete
Smith
> Sent: Wednesday, September 20, 2006 9:26 AM
> To: ham_amplifiers@yahoogroupscom
>
Subject: Re: [ham_amplifiers]
Censorship/Administrator
>
>
>
> I am going to respect
his anonymity.
>
> 73, Pete N4ZR
>
> At 08:32 AM
9/20/2006, Jan Erik Holm wrote:
> >OK it isn?t W8JI, who is
it?
> >
> >73 SM2EKM
>
>--------------------------------------
> >Pete Smith
wrote:
> >> This may be my first and last post on this list, but I
wanted to?
> clear
> >> a few misconceptions:
>
>>
> >> Tom Rausch is not the Admin of Amps. I'm not either
;^)
> >>
> >> W4AN was not a fan of free speech - he
replaced me as Admin of
> >> Towertalk when I refused to censor
posts there; this is not a?
> knock on
> >> Bill, just
a difference of philosophy.
> >>
> >> I run a local
community affairs mailing list with only two rules?
> -
sign
> >> your real name and maintain basic civility - keep
it?
> substantive, not
> >> personal. In 6 years, I've
had to ban one person for a week. A
> >> parallel list has no such
rules, and has disintegrated into ugly?
> name-
> >>
calling.
> >>
> >>>From what I have read, such a
regime on amps would have worked?
> pretty
> >> well,
though the Admin would have had to ban a few people.
> >>
>
>> 73, Pete Smith N4ZR
> >>
> >
>
>
> >
> >
> >Yahoo! Groups Links
>
>
> >
> >
> >
> >
> >
>
>
>
>
>
>
R L MEASURES, AG6K.
805-386-3734
r@...
?
Yahoo!
Groups Links
<*> To visit your group on the web, go
to:
???
<*>
Your email settings:
??? Individual Email |
Traditional
<*> To change settings online go
to:
???
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(Yahoo! ID required)
<*> To change settings via
email:
??? mailto:ham_amplifiers-digest@...
??? mailto:ham_amplifiers-fullfeatured@...
<*>
To unsubscribe from this group, send an email to:
??? ham_amplifiers-unsubscribe@...
<*>
Your use of Yahoo! Groups is subject to:
???
?
|
On Sep 19, 2006, at 7:40 PM, craxd wrote: Mike,
No, the melting temperature raises when you use silver in a solder. Silver melts at 960.8?C. Tin melts at 231.9?C. Silver-tin solder is eutectic (the lowest possible melting point) at 221?C, when the silver content is c. 6%. Less than 6% silver or more than 6% silver raises the melting point. The more silver, the higher the melting temperature. Some has to be
used at red hot brazing temperatures. Thus in order for it to flow and
bond, it has to be at the correct temperature to do it.
Best,
Will
--- In ham_amplifiers@..., "Mike Sawyer" <w3slk@...>
wrote:
This has some redeeming value, but on another bulletin board, the
topic of using nichrome wire came up being used as a meter shunt.
someone chimed in that you can't solder to nichrome wire. Another
stated that you had to add enough solder to the joint to make it
mechanically stable. I was under the impression that you had to use
allot of heat, (like one of those large soldering irons you see in the
bargain boxes below the flea market tables), due to the heat wicking
properties of the wire. Am I correct in that assumption or only half
correct?
Mod-U-Lator,
Mike(y)
W3SLK
Yahoo! Groups Links
R L MEASURES, AG6K. 805-386-3734 r@...
|
chortle On Sep 20, 2006, at 2:06 AM, w5uc wrote: The mesage got through anyway. VK6APK posted a respomse with the
announcement at the bottom and the censor missed it.
73,
Mike, W5UC
Yahoo! Groups Links
R L MEASURES, AG6K. 805-386-3734 r@...
|
On Sep 20, 2006, at 4:32 AM, GGLL wrote:
Jan Erik Holm escribi¨®:
Thank?s to W3SLK for the info, it finaly made the
old amps-list.
I was sorry to see what happened over at the old list,
personally I hate censorship no matter what it is. I sent a message there announcing the creation of this new list
and it was
censored, so I guess if "you know who" erased it to prevent AMPS
"instability".
Things became personal matters.
If the censor is not Tom, it's probably one of his drinkin' buddies. cheers, Guillermo
Best regards
Guillermo - LU8EYW.
For years I have been wounder who the moderator was at
the amps-list, I know now, guess I should have figured
it out.
73 Jim SM2EKM
Yahoo! Groups Links
R L MEASURES, AG6K. 805-386-3734 r@...
|
Re: Censorship/Administrator
On Sep 20, 2006, at 8:45 AM, Mike((W5UC)) & Kathy((K5MWH)) wrote: Pete, I guess you do what you think you must do, BUT, I have a lot
of trouble with the idea that someone operates an ¡°open¡± forum and
feels the need to hide. That concept really bothers me. I post my
name and callsign every time I post to a reflector, and I am very
suspicious about the intentions of someone who feels the need to
hide in the shadows. Amen, Mike. I found it curious that Tom knew the reasons why I got "unsubscribed" / jackbooted from AMPS without the reasons having been posted.
73,
Mike, W5UC
From: ham_amplifiers@...
[mailto:ham_amplifiers@...] On Behalf Of Pete Smith
Sent: Wednesday, September 20, 2006 9:26 AM
To: ham_amplifiers@...
Subject: Re: [ham_amplifiers] Censorship/Administrator
I am going to respect his anonymity.
73, Pete N4ZR
At 08:32 AM 9/20/2006, Jan Erik Holm wrote:
OK it isn?t W8JI, who is it?
73 SM2EKM
--------------------------------------
Pete Smith wrote:
This may be my first and last post on this list, but I wanted to clear
a few misconceptions:
Tom Rausch is not the Admin of Amps. I'm not either ;^)
W4AN was not a fan of free speech - he replaced me as Admin of
Towertalk when I refused to censor posts there; this is not a
knock on
Bill, just a difference of philosophy.
I run a local community affairs mailing list with only two rules
- sign
your real name and maintain basic civility - keep it
substantive, not
personal. In 6 years, I've had to ban one person for a week. A
parallel list has no such rules, and has disintegrated into ugly
name-
calling.
From what I have read, such a regime on amps would have worked
pretty
well, though the Admin would have had to ban a few people.
73, Pete Smith N4ZR
Yahoo! Groups Links
R L MEASURES, AG6K. 805-386-3734 r@...
|
Re: Censorship/Administrator
On Sep 20, 2006, at 9:30 AM, bill_w4zv wrote: --- In ham_amplifiers@..., "Pete Smith" <n4zr@...> wrote:
I run a local community affairs mailing list with only two rules - sign
your real name and maintain basic civility - keep it substantive, not
personal. I agree Pete, although I also maintain strict topic focus on the
Topband reflector. I got booted off of Topband for questioning questionable technical statements bu Tom RAUCH, W8JI. Bill, are you a friend of Tom?
AG6K wrote:
I was booted off of AMPS by W8JI, Charles Thomas Rauch, Jr. This list is off to a great start with a lie. I know who the
moderator is also and confirm it's not W8JI (...or me).
73, Bill
Yahoo! Groups Links
R L MEASURES, AG6K. 805-386-3734 r@...
|
On Sep 20, 2006, at 10:16 AM, Martin AA6E wrote: Here's a simple request from one op who is interested in amps. Personal
grudge matches are bad news and will put off people who don't have any
ax to grind. The W8JI-AG6K dispute that existed on AMPS - and previously on rec,amateur-radio.homebrew was not grudge based, it was based on electronic theory. W8JI's position was that AC circuit-analysis was inaccurate when analyzing VHF parasitic suppressors, that Ni-Cr alloys had reverse skin effect at HF, and that even though a DC current pulse could ring a HF-resonant circuit, it could not ring a VHF-resonant circuit. I did not agree and said so. If we really want to support ham amplifier work, this
stuff is counterproductive. Allowing newcomers to believe that W8JI's above statements are correct is productive? Let's take our flames back to the NNTP world. Telling people what to do is hardly good form.
I am giving the Yahoo group a try, because I think the anonymous
moderation and "appropriate use" policies of the other list were very
worrisome.
The straw that broke the camel's back was when Tom censored my post about why the TL-922 switches faster from Tx to Rx than it does when switching from Rx to Tx -- which could help to explain why so many 922 owners experience parasitic arcing when switching to Rx from Tx.
I hope I don't have to unsubscribe from both of these groups!
Zzzzzzzzzzz
73 Martin AA6E
...
R L MEASURES, AG6K. 805-386-3734 r@...
|
Re: Censorship/Administrator
On Sep 20, 2006, at 11:29 AM, Dino Darling wrote: My guess is that Pete won't get banned from here, if that was what he
was implying. If he chooses not to post here, it will be of his own
free will. at least, this is my understanding of policy on this new
and improved list.
I wonder who else has been banned from the other list in the past week... Probably no one. Apparently Tom has been quietly censoring AMPS members who mention this group.
At 04:45 AM 9/20/2006, you wrote:
This may be my first and last post on this list, but I wanted to clear
a few misconceptions: Dino - K6RIX
dino@...
--
No virus found in this outgoing message.
Checked by AVG Anti-Virus.
Version: 7.1.405 / Virus Database: 268.12.5/451 - Release Date: 9/19/2006
Yahoo! Groups Links
R L MEASURES, AG6K. 805-386-3734 r@...
|
Re: Censorship/Administrator
On Sep 20, 2006, at 11:33 AM, Pete Smith wrote: And what's the alternative? I should "out" him? That's not my
prerogative, either.
I have been a member of amps since its inception, and while I
disagree with prior restraint of speech, I think its series of
moderators have acted with great self-control in the face of
extraordinary provocation. I believe the previous moderator
resigned at least in part because of the private vitriol directed
at him.
I'm done now - if you guys are going to run an amps reflector, talk
amps. But you are opposed to talking about those who censor amplifier discussions?
73, Pete N4ZR
At 11:45 AM 9/20/2006, Mike(W5UC) & Kathy(K5MWH) wrote:
Pete, I guess you do what you think you must do, BUT, I have a lot
of trouble with the idea that someone operates an ¡°open¡± forum and
feels the need to hide. That concept really bothers me. I post
my name and callsign every time I post to a reflector, and I am
very suspicious about the intentions of someone who feels the need
to hide in the shadows.
73,
Mike, W5UC
<>
----------
From: ham_amplifiers@...
[mailto:ham_amplifiers@...] On Behalf Of Pete Smith
Sent: Wednesday, September 20, 2006 9:26 AM
To: ham_amplifiers@...
Subject: Re: [ham_amplifiers] Censorship/Administrator
I am going to respect his anonymity.
73, Pete N4ZR
At 08:32 AM 9/20/2006, Jan Erik Holm wrote:
OK it isn?t W8JI, who is it?
73 SM2EKM
--------------------------------------
Pete Smith wrote:
This may be my first and last post on this list, but I wanted to
clear
a few misconceptions:
Tom Rausch is not the Admin of Amps. I'm not either ;^)
W4AN was not a fan of free speech - he replaced me as Admin of
Towertalk when I refused to censor posts there; this is not a
knock on
Bill, just a difference of philosophy.
I run a local community affairs mailing list with only two rules
- sign
your real name and maintain basic civility - keep it
substantive, not
personal. In 6 years, I've had to ban one person for a week. A
parallel list has no such rules, and has disintegrated into ugly
name-
calling.
From what I have read, such a regime on amps would have worked
pretty well, though the Admin would have had to ban a few people.
73, Pete Smith N4ZR
Yahoo! Groups Links
Yahoo! Groups Links
R L MEASURES, AG6K. 805-386-3734 r@...
|
Re: Panasonic/Matsushita Switcher HV-PS u-Wave Oven
On Sep 20, 2006, at 1:30 PM, Dick wrote: Very interesting Rich.
What would be the regulation of this switched mode power supply?
Cheers, Dick I have no idea, but it has to be pretty good, since due to a switcher's light weight, if there was a lot of ESR, something would be likely to melt down.
--- In ham_amplifiers@..., R L Measures <r@...> wrote:
I purchased one unit from Costco. The price was $99. The unit was
surprisingly light in weight compared to my old transformer-
powered
400W u-wave oven. I found no RFI problem from 50 - 550 MHz. The
rating is 1300w, which is most probably the DC input power to the
magnetron. At 120V, c. 17A of current is drawn. If a SSB amateur
radio amplifier was built using the Matsushita switcher PS, two units
are probably needed. By putting the 120V inputs to the two switcher
supplies in series, operation from a standard, 240VCT, 20A outlet
would work. I have not yet disassembled the oven to measure the HV.
Does anyone know what's the typical range of potentials used to power
magnetrons of this size? tnx
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