The inverter microwave ovens are lightweight and cheap. Panasonic made them
originally.
Solid state microwave ovens are expensive and few. Really expensive, thousands.
Its hard to beat using a $15 tube from China to get 800 watts of RF. A 300 watt
pallet from Ampleon using LDMOS is few hundred $.
John K5PRO
On Feb 29, 2024, 6:48 PM, at 6:48 PM, amps-request@contesting.com wrote:
>Send Amps mailing list submissions to
> amps@contesting.com
>
>To subscribe or unsubscribe via the World Wide Web, visit
> http://lists.contesting.com/mailman/listinfo/amps
>or, via email, send a message with subject or body 'help' to
> amps-request@contesting.com
>
>You can reach the person managing the list at
> amps-owner@contesting.com
>
>When replying, please edit your Subject line so it is more specific
>than "Re: Contents of Amps digest..."
>
>
>Today's Topics:
>
> 1. Re: High Voltage Switching Supply (Facility 406)
> 2. High Voltage Switching Supply (Paul Decker)
> 3. Re: High Voltage Switching Supply (Joe)
> 4. Re: High Voltage Switching Supply (Mike McCarthy, W1NR)
> 5. Re: High Voltage Switching Supply (Richard Solomon)
> 6. Re: High Voltage Switching Supply (jtml@losalamos.com)
>
>
>----------------------------------------------------------------------
>
>Message: 1
>Date: Thu, 29 Feb 2024 13:48:20 -0800
>From: Facility 406 <facility_406@bruteforcedevelopment.com>
>To: amps@contesting.com
>Subject: Re: [Amps] High Voltage Switching Supply
>Message-ID:
> <0245a70a-535a-4c75-fc20-7f5549f35c27@bruteforcedevelopment.com>
>Content-Type: text/plain; charset=utf-8; format=flowed
>
>I've been pulling transformers from microwave ovens since the early
>80's.
>
>I've yet to see the switching mode HV supplies I've heard about.
>
>Anyone seen these, or have an example?
>
>I've also heard that some ovens went to solid state RF generators, to
>replace magnatrons. Anyone have, or seen any of these?
>
>Kurt
>
>
>
>
>
>------------------------------
>
>Message: 2
>Date: Thu, 29 Feb 2024 17:07:10 -0500 (EST)
>From: Paul Decker <kg7hf@comcast.net>
>To: amps@contesting.com, "jtml@losalamos.com" <jtml@losalamos.com>
>Subject: [Amps] High Voltage Switching Supply
>Message-ID: <791927959.672161.1709244430533@connect.xfinity.com>
>Content-Type: text/plain; charset=UTF-8
>
>John,
>Is this what you are thinking of?
>
>https://www.arrl.org/files/file/Technology/6Mhanson8877.pdf
>
>Paul.
>KG7HF
>
>
>>
>> Message: 1
>> Date: Thu, 29 Feb 2024 11:00:56 -0700
>> From: "jtml@losalamos.com" <jtml@losalamos.com>
>> To: amps@contesting.com
>> Subject: [Amps] High Voltage Switching Supply
>> Message-ID: <081961a2-8f35-4c0d-8651-18f0560c6cca@losalamos.com>
>> Content-Type: text/plain; charset=UTF-8
>>
>> I thought there was.a design on QEX at one time. But maybe it was
>QST?
>> There are some consumer microwaves that use AC/DC converters in
>switchmode.
>>
>> We have commercial 10 kW Glassman switchers at work that put out 1500
>VDC at 6 Amps but they are not cheap. They power screen grid on TH628L
>RF tube.
>>
>> John
>> K5PRO
>
>
>
>------------------------------
>
>Message: 3
>Date: Thu, 29 Feb 2024 16:38:58 -0600
>From: Joe <nss@mwt.net>
>To: Paul Decker <kg7hf@comcast.net>, amps@contesting.com,
> "jtml@losalamos.com" <jtml@losalamos.com>
>Subject: Re: [Amps] High Voltage Switching Supply
>Message-ID: <51b81ec7-2bd2-473b-ef28-03413e5877f4@mwt.net>
>Content-Type: text/plain; charset=UTF-8; format=flowed
>
>Nope the one I remember is Jan of 2017
>
>Joe WB9SBD
>.
>
>A Contest 40 Years in The Making!
><https://w9et.com/home.html>
>MAIDENHEAD MAYHEM
>https://w9et.com/home.html <https://w9et.com/home.html>
>On 2/29/2024 4:07 PM, Paul Decker wrote:
>> John,
>> Is this what you are thinking of?
>>
>> https://www.arrl.org/files/file/Technology/6Mhanson8877.pdf
>>
>> Paul.
>> KG7HF
>>
>>
>>> Message: 1
>>> Date: Thu, 29 Feb 2024 11:00:56 -0700
>>> From:"jtml@losalamos.com" <jtml@losalamos.com>
>>> To:amps@contesting.com
>>> Subject: [Amps] High Voltage Switching Supply
>>> Message-ID:<081961a2-8f35-4c0d-8651-18f0560c6cca@losalamos.com>
>>> Content-Type: text/plain; charset=UTF-8
>>>
>>> I thought there was.a design on QEX at one time. But maybe it was
>QST?
>>> There are some consumer microwaves that use AC/DC converters in
>switchmode.
>>>
>>> We have commercial 10 kW Glassman switchers at work that put out
>1500 VDC at 6 Amps but they are not cheap. They power screen grid on
>TH628L RF tube.
>>>
>>> John
>>> K5PRO
>> _______________________________________________
>> Amps mailing list
>> Amps@contesting.com
>> http://lists.contesting.com/mailman/listinfo/amps
>>
>
>
>------------------------------
>
>Message: 4
>Date: Thu, 29 Feb 2024 18:29:53 -0500
>From: "Mike McCarthy, W1NR" <lists@w1nr.net>
>To: amps@contesting.com
>Subject: Re: [Amps] High Voltage Switching Supply
>Message-ID: <cb9aac33-e410-4feb-8530-794e066fbfc2@w1nr.net>
>Content-Type: text/plain; charset=UTF-8; format=flowed
>
>QST January 2017, page 30 is the article by N0KC. You have to go
>qst-in-depth to download the BOM, schematic and other data. You must be
>
>an ARRL member to access it.
>
>--
>73 de Mike, W1NR
>
>THAT was the equation. EXISTENCE!... SURVIVAL... must cancel out...
>programming!
>
>- Ruk -
>
>
>
>------------------------------
>
>Message: 5
>Date: Thu, 29 Feb 2024 17:48:28 -0700
>From: Richard Solomon <dickw1ksz@gmail.com>
>Cc: Amplifiers <amps@contesting.com>
>Subject: Re: [Amps] High Voltage Switching Supply
>Message-ID:
> <CAC5FBO9+cN8prZbkW+9R_TKywbEi8PexMTdB6t4PMOceaJRvGQ@mail.gmail.com>
>Content-Type: text/plain; charset="UTF-8"
>
>Unfortunately, the link to the Power supply is a
>dead end.
>
>It's a PS--2500A, made by Watts unlimited. They
>seem to no longer be with us.
>
>73, Dick, W1KSZ
>
>On Thu, Feb 29, 2024, 3:07?PM Paul Decker <kg7hf@comcast.net> wrote:
>
>> John,
>> Is this what you are thinking of?
>>
>> https://www.arrl.org/files/file/Technology/6Mhanson8877.pdf
>>
>> Paul.
>> KG7HF
>>
>>
>> >
>> > Message: 1
>> > Date: Thu, 29 Feb 2024 11:00:56 -0700
>> > From: "jtml@losalamos.com" <jtml@losalamos.com>
>> > To: amps@contesting.com
>> > Subject: [Amps] High Voltage Switching Supply
>> > Message-ID: <081961a2-8f35-4c0d-8651-18f0560c6cca@losalamos.com>
>> > Content-Type: text/plain; charset=UTF-8
>> >
>> > I thought there was.a design on QEX at one time. But maybe it was
>QST?
>> > There are some consumer microwaves that use AC/DC converters in
>> switchmode.
>> >
>> > We have commercial 10 kW Glassman switchers at work that put out
>1500
>> VDC at 6 Amps but they are not cheap. They power screen grid on
>TH628L RF
>> tube.
>> >
>> > John
>> > K5PRO
>>
>> _______________________________________________
>> Amps mailing list
>> Amps@contesting.com
>> http://lists.contesting.com/mailman/listinfo/amps
>>
>
>
>------------------------------
>
>Message: 6
>Date: Thu, 29 Feb 2024 18:48:15 -0700
>From: "jtml@losalamos.com" <jtml@losalamos.com>
>To: Joe <nss@mwt.net>
>Cc: Paul Decker <kg7hf@comcast.net>,amps@contesting.com
>Subject: Re: [Amps] High Voltage Switching Supply
>Message-ID: <67080fdc-5a71-4118-9d68-f3ff19c4c46b@losalamos.com>
>Content-Type: text/plain; charset=UTF-8
>
>Yes, i remember the 2017 design. The earlier one, the 8877 amp with
>Watts Unlimited power supply, is likely not available anymore since Tim
>Hulick is SK.
>
>John
>K5PRO
>
>On Feb 29, 2024, 3:39 PM, at 3:39 PM, Joe <nss@mwt.net> wrote:
>>Nope the one I remember is Jan of 2017
>>
>>Joe WB9SBD
>>.
>>
>>A Contest 40 Years in The Making!
>><https://w9et.com/home.html>
>>MAIDENHEAD MAYHEM
>>https://w9et.com/home.html <https://w9et.com/home.html>
>>On 2/29/2024 4:07 PM, Paul Decker wrote:
>>> John,
>>> Is this what you are thinking of?
>>>
>>> https://www.arrl.org/files/file/Technology/6Mhanson8877.pdf
>>>
>>> Paul.
>>> KG7HF
>>>
>>>
>>>> Message: 1
>>>> Date: Thu, 29 Feb 2024 11:00:56 -0700
>>>> From:"jtml@losalamos.com" <jtml@losalamos.com>
>>>> To:amps@contesting.com
>>>> Subject: [Amps] High Voltage Switching Supply
>>>> Message-ID:<081961a2-8f35-4c0d-8651-18f0560c6cca@losalamos.com>
>>>> Content-Type: text/plain; charset=UTF-8
>>>>
>>>> I thought there was.a design on QEX at one time. But maybe it was
>>QST?
>>>> There are some consumer microwaves that use AC/DC converters in
>>switchmode.
>>>>
>>>> We have commercial 10 kW Glassman switchers at work that put out
>>1500 VDC at 6 Amps but they are not cheap. They power screen grid on
>>TH628L RF tube.
>>>>
>>>> John
>>>> K5PRO
>>> _______________________________________________
>>> Amps mailing list
>>> Amps@contesting.com
>>> http://lists.contesting.com/mailman/listinfo/amps
>>>
>
>
>------------------------------
>
>Subject: Digest Footer
>
>_______________________________________________
>Amps mailing list
>Amps@contesting.com
>http://lists.contesting.com/mailman/listinfo/amps
>
>
>------------------------------
>
>End of Amps Digest, Vol 254, Issue 11
>*************************************
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|