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It is information like this that maintains my interest in amateur radio.

de Paul, W8AEF

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.

de Paul, W8AEF

----- Original Message -----
From: "Roger Glover" <r.glover@...>
To: <ham_amplifiers@...>
Sent: Wednesday, September 20, 2006 2:39 PM
Subject: [-] Re: [ham_amplifiers] Re: Panasonic/Matsushita Switcher HV-PS
u-Wave Oven

Dave Smith VK3HZ did some ivvesigation of these, with interesting findings
at:

www.users.bigpond.net.au/dwsmith/hv_inverter.pdf

Roger



----- Original Message -----
From: "Dick" <pa3duv@...>
To: <ham_amplifiers@...>
Sent: Wednesday, September 20, 2006 9:33 PM
Subject: [ham_amplifiers] Re: Panasonic/Matsushita Switcher HV-PS u-Wave
Oven

Very interesting Rich.
What would be the regulation of this switched mode power supply?
Cheers, Dick

--- 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

R L MEASURES, AG6K. 805-386-3734
r@...

Yahoo! Groups Links

R L MEASURES, AG6K. 805-386-3734
r@...

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

On Sep 20, 2006, at 7:45 PM, Paul Playford wrote:

Beyond installing your ECBS and parasitic suppression kits in an SB-220 and
a Henry 2K-3 (both worked very well, thank you),

good news, tnx.

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.

Why not?, it's a more capable tube.

Normally, my moto is "If it works, don't fix it." The 76A modification was
a serious violation of my moto.

My dot matrix printer worked - but now it's gone.

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.

The only question is how to bring the output down to 2500vdc.

cheers, Paul

de Paul, W8AEF

----- 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.

Yahoo! Groups Links

R L MEASURES, AG6K. 805-386-3734
r@...