Seems to me there was also one in strays that use something like a dozen 1625’s
on parallel
Sent from my device that creates typos
> On Dec 5, 2017, at 09:05, amps-request@contesting.com wrote:
>
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> Today's Topics:
>
> 1. Re: amplifier in 1960's QST (Paul Christensen)
> 2. Re: MFJ products (Jim Thomson)
> 3. Re: MFJ products (John Bodine)
> 4. Re: MFJ products (Shon Edwards)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Mon, 4 Dec 2017 20:54:32 -0500
> From: "Paul Christensen" <w9ac@arrl.net>
> To: <amps@contesting.com>
> Subject: Re: [Amps] amplifier in 1960's QST
> Message-ID: <004101d36d6b$ff519020$fdf4b060$@arrl.net>
> Content-Type: text/plain; charset="us-ascii"
>
> Possibly the Galaxy 2000+. A full description was authored by Wilfred
> Scherer, W2AEF and appears on p. 17 in the January, 1967 issue of CQ
> Magazine. A total of <gulp> ten (10) 6HF5 sweep tubes are used in
> parallel. The design also makes use of a dynamic linearizer by sampling
> input and output RF voltage. Non-linearity produces a voltage that's then
> applied to a series regular in the bias supply.
>
> Paul, W9AC
>
> -----Original Message-----
> From: Amps [mailto:amps-bounces@contesting.com] On Behalf Of Carl
> Sent: Monday, December 4, 2017 7:53 PM
> To: Fuqua, Bill L <wlfuqu00@uky.edu>; amps@contesting.com
> Subject: Re: [Amps] amplifier in 1960's QST
>
> I vaguely remember the article and the tube load was 50 Ohms so there was no
> Load control!!
>
> WRL or Globe had a something 2000 that was all sweep tubes.
>
> Carl
>
>
> ----- Original Message -----
> From: "Fuqua, Bill L" <wlfuqu00@uky.edu>
> To: <amps@contesting.com>
> Sent: Monday, December 04, 2017 12:06 PM
> Subject: [Amps] amplifier in 1960's QST
>
>
>> I have been looking for an article about a suitcase kW amplifier using a
>> load of sweep tubes. directly off power line power supply (voltage
>> multiplier) and a broadband matching network. Not interested in building
>> one because there are all sorts of problems with the idea. I think it was
>> in late 60's but I can't find it. Perhaps it was not QST.
>>
>> Anyone remember it?
>>
>>
>> 73
>>
>> Bill wa4lav
>>
>> _______________________________________________
>> Amps mailing list
>> Amps@contesting.com
>> http://lists.contesting.com/mailman/listinfo/amps
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>
>
> ------------------------------
>
> Message: 2
> Date: Tue, 5 Dec 2017 06:44:04 -0800
> From: "Jim Thomson" <jim.thom@telus.net>
> To: "Shon Edwards" <sre.1966@gmail.com>, "Amplifier Reflector"
> <amps@contesting.com>
> Subject: Re: [Amps] MFJ products
> Message-ID: <3BCC83556CB544E89AB5412DECE378FF@JimPC>
> Content-Type: text/plain; charset="UTF-8"
>
> ## You forgot to tell us that it was a 40 A 13.8 vdc, switching type power
> supply !
> Found it on U tube, where the vdc pegged past 16 vdc. Another fellow had his
> way over 45 vdc...and fried his yaesu. The u tube fellow says his did not
> have
> any over voltage protection built into it ! Since his was under warranty,
> MFJ will
> repair it..... but not the very expensive yaesu xcvr.
>
> ## Fuses on radios will only protect against excess current, not excess
> voltage. Your
> surge protector on the input of the 120 vac.. feeding the MFJ switching
> supply, will not help at all.
> The issue is the lack of over voltage protection in the mfj switching supply,
> and what ever caused
> it to crank out excess vdc in the 1st place... frying everything connected
> to it.
>
> ## Either replace with a better quality switcher from a different
> manufacturer, or use
> an analog supply, like a 50 A CCS astron.
>
> ## way too many issues with the MFJ-4245 switcher imo. if the supply bows
> up, who cares... but when the
> same supply blows up a bunch of expensive gear connected to it, then its a
> serious issue.
>
> Jim VE7RF
>
>
>
>
>
> From: Shon Edwards
> Sent: Sunday, December 03, 2017 8:42 PM
> To: Jim Thomson ; Amplifier Reflector
> Subject: Re: [Amps] MFJ products
>
> I know this isn't really an amp question, but I checked my email for
> mfj-4245mv and found this one. Last week, the current just took off. Fried
> a couple radios whose fuses didn't work. Also my surge protector didn't stop
> it from frying my radios. Any idea what caused this or how to fix it?
>
> Thanks!
>
> de Shon, K6QT
>
> Shon R. Edwards, MA, AG (Czech Republic)
>
> Amateur call: K6QT
> 1039 N 2575 W
> Layton, UT, 84041-7709
> USA
> Home phone: (801) 444-3445
> E-mail: sre.1966@gmail.com
>
>
> or
>
> Shon Edwards
> 715 Strawberry Creek Private Rd.
> Bedford, WY 83112
> Cell: (307) 248-2104
>
> On Tue, Sep 11, 2012 at 8:22 AM, Jim Thomson <jim.thom@telus.net> wrote:
>
> Date: Tue, 11 Sep 2012 10:26:27 +0200
> From: "Peter Frenning [OZ1PIF]" <peter@frenning.dk>
>
> Subject: Re: [Amps] MFJ products
>
>
> My 5 cents worth:
> I own and use several pieces of MFJ equipment, much of it has been in
> daily use for more than 10years:
> a MFJ-4245MV SMPS, no RF-hash, and has performed nearly 24/ 7 for
> more than 10years
> a MFJ-259B antenna analyzer, without a doubt the most useful tool
> in my toolbox
> I know there are better/more accurate/higher quality analyzers
> available now - at vastly higher prices!
> this one has been in use for more than 10 years in my shack and
> in the field, and when I broke it
> (my own fault - reverse polarity) MFJ was very helpful with
> repair suggestions
> I owned a MFJ-969 tuner for several years - did exactly what it was
> supposed to do at a very reasonable price
> Various power meters an dummy loads - again they have been
> performing exactly as expected.
>
> To conclude: yes corners have been cut here and there, but at the prices
> asked you get fair usefulness and many times equipment which few of us
> could afford without MFJ supplying it.
>
> --
> Vy 73 de OZ1PIF/5Q2M, Peter
>
> ## You obviously have not tried one of their SS HF linear amps..like the
> AL-600 or AL-1300. I defy anybody to get one to run full bore for 5 years
> straight.
>
> Jim VE7RF.
>
>
> _______________________________________________
> Amps mailing list
> Amps@contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
>
>
>
> ------------------------------
>
> Message: 3
> Date: Tue, 5 Dec 2017 09:49:53 -0500
> From: John Bodine <john.bodine@gmail.com>
> To: amps@contesting.com
> Subject: Re: [Amps] MFJ products
> Message-ID:
> <CAFJ4jdbxR9TzoR+cKKXLUX7nuq-d9sPnQBF6CKKe1zx_xWWTvA@mail.gmail.com>
> Content-Type: text/plain; charset="UTF-8"
>
> Long ago I removed all adjustable voltage supplies from the shack because a
> bump or a grandchild can break your heart(cook your transceiver).
>
>> On Tue, Dec 5, 2017 at 9:44 AM, Jim Thomson <jim.thom@telus.net> wrote:
>>
>> ## You forgot to tell us that it was a 40 A 13.8 vdc, switching type
>> power supply !
>> Found it on U tube, where the vdc pegged past 16 vdc. Another fellow had
>> his
>> way over 45 vdc...and fried his yaesu. The u tube fellow says his did
>> not have
>> any over voltage protection built into it ! Since his was under
>> warranty, MFJ will
>> repair it..... but not the very expensive yaesu xcvr.
>>
>> ## Fuses on radios will only protect against excess current, not excess
>> voltage. Your
>> surge protector on the input of the 120 vac.. feeding the MFJ switching
>> supply, will not help at all.
>> The issue is the lack of over voltage protection in the mfj switching
>> supply, and what ever caused
>> it to crank out excess vdc in the 1st place... frying everything
>> connected to it.
>>
>> ## Either replace with a better quality switcher from a different
>> manufacturer, or use
>> an analog supply, like a 50 A CCS astron.
>>
>> ## way too many issues with the MFJ-4245 switcher imo. if the supply
>> bows up, who cares... but when the
>> same supply blows up a bunch of expensive gear connected to it, then its
>> a serious issue.
>>
>> Jim VE7RF
>>
>>
>>
>>
>>
>> From: Shon Edwards
>> Sent: Sunday, December 03, 2017 8:42 PM
>> To: Jim Thomson ; Amplifier Reflector
>> Subject: Re: [Amps] MFJ products
>>
>> I know this isn't really an amp question, but I checked my email for
>> mfj-4245mv and found this one. Last week, the current just took off.
>> Fried a couple radios whose fuses didn't work. Also my surge protector
>> didn't stop it from frying my radios. Any idea what caused this or how to
>> fix it?
>>
>> Thanks!
>>
>> de Shon, K6QT
>>
>> Shon R. Edwards, MA, AG (Czech Republic)
>>
>> Amateur call: K6QT
>> 1039 N 2575 W
>> Layton, UT, 84041-7709
>> USA
>> Home phone: (801) 444-3445
>> E-mail: sre.1966@gmail.com
>>
>>
>> or
>>
>> Shon Edwards
>> 715 Strawberry Creek Private Rd.
>> Bedford, WY 83112
>> Cell: (307) 248-2104
>>
>> On Tue, Sep 11, 2012 at 8:22 AM, Jim Thomson <jim.thom@telus.net> wrote:
>>
>> Date: Tue, 11 Sep 2012 10:26:27 +0200
>> From: "Peter Frenning [OZ1PIF]" <peter@frenning.dk>
>>
>> Subject: Re: [Amps] MFJ products
>>
>>
>> My 5 cents worth:
>> I own and use several pieces of MFJ equipment, much of it has been in
>> daily use for more than 10years:
>> a MFJ-4245MV SMPS, no RF-hash, and has performed nearly 24/ 7 for
>> more than 10years
>> a MFJ-259B antenna analyzer, without a doubt the most useful tool
>> in my toolbox
>> I know there are better/more accurate/higher quality analyzers
>> available now - at vastly higher prices!
>> this one has been in use for more than 10 years in my shack and
>> in the field, and when I broke it
>> (my own fault - reverse polarity) MFJ was very helpful with
>> repair suggestions
>> I owned a MFJ-969 tuner for several years - did exactly what it was
>> supposed to do at a very reasonable price
>> Various power meters an dummy loads - again they have been
>> performing exactly as expected.
>>
>> To conclude: yes corners have been cut here and there, but at the prices
>> asked you get fair usefulness and many times equipment which few of us
>> could afford without MFJ supplying it.
>>
>> --
>> Vy 73 de OZ1PIF/5Q2M, Peter
>>
>> ## You obviously have not tried one of their SS HF linear amps..like the
>> AL-600 or AL-1300. I defy anybody to get one to run full bore for 5
>> years
>> straight.
>>
>> Jim VE7RF.
>>
>>
>> _______________________________________________
>> Amps mailing list
>> Amps@contesting.com
>> http://lists.contesting.com/mailman/listinfo/amps
>>
>> _______________________________________________
>> Amps mailing list
>> Amps@contesting.com
>> http://lists.contesting.com/mailman/listinfo/amps
>>
>
>
>
> --
>
> Later,
> John Bodine/WU2E
>
>
> ------------------------------
>
> Message: 4
> Date: Tue, 5 Dec 2017 08:03:12 -0700
> From: Shon Edwards <sre.1966@gmail.com>
> To: Jim Thomson <jim.thom@telus.net>, Amplifier Reflector
> <amps@contesting.com>
> Subject: Re: [Amps] MFJ products
> Message-ID:
> <CAC3=1e-Degve6SV_XXb0tbM8V-tQstLw=JXtJb5KrdMcCu-r=w@mail.gmail.com>
> Content-Type: text/plain; charset="UTF-8"
>
> Thanks Jim and everyone else (and the sympathies). Sorry I neglected to
> give all the info. Yes, it's a mystery to me why all happened just as it
> did. No matter how low I switched the DC Adjust dial (9-15 V), it just
> pegged itself it seemed even a bit higher than the max.
>
> Shon R. Edwards, MA, AG (Czech Republic)
> Amateur call: K6QT
> 1039 N 2575 W
> Layton, UT, 84041-7709
> USA
> Home phone: (801) 444-3445
> E-mail: sre.1966@gmail.com
>
> or
>
> Shon Edwards
> 715 Strawberry Creek Private Rd.
> Bedford, WY 83112
> Cell: (307) 248-2104
>
>> On Tue, Dec 5, 2017 at 7:44 AM, Jim Thomson <jim.thom@telus.net> wrote:
>>
>> ## You forgot to tell us that it was a 40 A 13.8 vdc, switching type
>> power supply !
>> Found it on U tube, where the vdc pegged past 16 vdc. Another fellow had
>> his
>> way over 45 vdc...and fried his yaesu. The u tube fellow says his did
>> not have
>> any over voltage protection built into it ! Since his was under
>> warranty, MFJ will
>> repair it..... but not the very expensive yaesu xcvr.
>>
>> ## Fuses on radios will only protect against excess current, not excess
>> voltage. Your
>> surge protector on the input of the 120 vac.. feeding the MFJ switching
>> supply, will not help at all.
>> The issue is the lack of over voltage protection in the mfj switching
>> supply, and what ever caused
>> it to crank out excess vdc in the 1st place... frying everything
>> connected to it.
>>
>> ## Either replace with a better quality switcher from a different
>> manufacturer, or use
>> an analog supply, like a 50 A CCS astron.
>>
>> ## way too many issues with the MFJ-4245 switcher imo. if the supply
>> bows up, who cares... but when the
>> same supply blows up a bunch of expensive gear connected to it, then its
>> a serious issue.
>>
>> Jim VE7RF
>>
>>
>>
>>
>> *From:* Shon Edwards
>> *Sent:* Sunday, December 03, 2017 8:42 PM
>> *To:* Jim Thomson ; Amplifier Reflector
>> *Subject:* Re: [Amps] MFJ products
>>
>> I know this isn't really an amp question, but I checked my email for
>> mfj-4245mv and found this one. Last week, the current just took off.
>> Fried a couple radios whose fuses didn't work. Also my surge protector
>> didn't stop it from frying my radios. Any idea what caused this or how to
>> fix it?
>>
>> Thanks!
>>
>> de Shon, K6QT
>>
>> Shon R. Edwards, MA, AG (Czech Republic)
>> Amateur call: K6QT
>> 1039 N 2575 W
>> <https://maps.google.com/?q=1039+N+2575+W+Layton,+UT,+%0D+84041&entry=gmail&source=g>
>> Layton, UT, 84041-7709
>> USA
>> Home phone: (801) 444-3445
>> E-mail: sre.1966@gmail.com
>>
>> or
>>
>> Shon Edwards
>> 715 Strawberry Creek Private Rd.
>> <https://maps.google.com/?q=715+Strawberry+Creek+Private+Rd.%0D+Bedford,+WY+83112&entry=gmail&source=g>
>> Bedford, WY 83112
>> <https://maps.google.com/?q=715+Strawberry+Creek+Private+Rd.%0D+Bedford,+WY+83112&entry=gmail&source=g>
>> Cell: (307) 248-2104
>>
>>> On Tue, Sep 11, 2012 at 8:22 AM, Jim Thomson <jim.thom@telus.net> wrote:
>>>
>>> Date: Tue, 11 Sep 2012 10:26:27 +0200
>>> From: "Peter Frenning [OZ1PIF]" <peter@frenning.dk>
>>>
>>> Subject: Re: [Amps] MFJ products
>>>
>>>
>>> My 5 cents worth:
>>> I own and use several pieces of MFJ equipment, much of it has been in
>>> daily use for more than 10years:
>>> a MFJ-4245MV SMPS, no RF-hash, and has performed nearly 24/ 7 for
>>> more than 10years
>>> a MFJ-259B antenna analyzer, without a doubt the most useful tool
>>> in my toolbox
>>> I know there are better/more accurate/higher quality analyzers
>>> available now - at vastly higher prices!
>>> this one has been in use for more than 10 years in my shack and
>>> in the field, and when I broke it
>>> (my own fault - reverse polarity) MFJ was very helpful with
>>> repair suggestions
>>> I owned a MFJ-969 tuner for several years - did exactly what it was
>>> supposed to do at a very reasonable price
>>> Various power meters an dummy loads - again they have been
>>> performing exactly as expected.
>>>
>>> To conclude: yes corners have been cut here and there, but at the prices
>>> asked you get fair usefulness and many times equipment which few of us
>>> could afford without MFJ supplying it.
>>>
>>> --
>>> Vy 73 de OZ1PIF/5Q2M, Peter
>>>
>>> ## You obviously have not tried one of their SS HF linear amps..like the
>>> AL-600 or AL-1300. I defy anybody to get one to run full bore for 5
>>> years
>>> straight.
>>>
>>> Jim VE7RF.
>>>
>>> _______________________________________________
>>> Amps mailing list
>>> Amps@contesting.com
>>> http://lists.contesting.com/mailman/listinfo/amps
>>>
>>
>>
>
>
> ------------------------------
>
> Subject: Digest Footer
>
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>
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> ------------------------------
>
> End of Amps Digest, Vol 180, Issue 6
> ************************************
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