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Author Topic: Looking for Linear Power Supply  (Read 3325 times)

Offline TRI International

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Looking for Linear Power Supply
« on: March 10, 2021, 1703 UTC »
What I'm looking for is a power supply that is 110 Volt Ac  1500 watt  with 18 to 20VDC output for my linear. Any Ideas and price thanks in advance.
We need another card to shut out the draught HW ABT URS?
Use Shazam app. to ID songs, listening direct Airspray RTL SDR , Ham It UP Plus connected to 2 V shape long wires  40ft. high with a MFJ 941C Antenna tuner
QSL to trlinternational@yahoo.com or  trlinternational@protonmail.com

Offline ChrisSmolinski

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Re: Looking for Linear Power Supply
« Reply #1 on: March 10, 2021, 1708 UTC »
You could check out eBay, there are often some esoteric used/refurb power supplies there that might be suitable.  New is probably going to be expensive, assuming you don't want a Pride of China unit that will blow up in your face  :)
Chris Smolinski
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Offline TRI International

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Re: Looking for Linear Power Supply
« Reply #2 on: March 10, 2021, 1713 UTC »
I checked ebay but not sure what Im looking for which sucks lol
We need another card to shut out the draught HW ABT URS?
Use Shazam app. to ID songs, listening direct Airspray RTL SDR , Ham It UP Plus connected to 2 V shape long wires  40ft. high with a MFJ 941C Antenna tuner
QSL to trlinternational@yahoo.com or  trlinternational@protonmail.com

Offline Stretchyman

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Re: Looking for Linear Power Supply
« Reply #3 on: March 10, 2021, 1827 UTC »
Commonly available 24V smpsu's all over eBay.

If you think they're manufactured in any other place than CH, think again! They aren't made in the US..

Despite the bad rep it mainly down to ignorance as they are in the main absolutely fine.

Try and stick with a branded version like; JCPOWER or MEANWELL.

Just parrallel up what you need 3x500W or 2x750W or whatever.

24V will adj down to 18V.

Btw, you're looking for a power supply for your linear, not a linear power supply as that's an analogue, i.e. not switching lump with a massive transformer etc.

Str.
« Last Edit: March 10, 2021, 1831 UTC by Stretchyman »
'It's better to give than receive' so why Rx when you can Tx!

                                              ;)

Offline redhat

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Re: Looking for Linear Power Supply
« Reply #4 on: March 10, 2021, 1847 UTC »
Commonly available 24V smpsu's all over eBay.

If you think they're manufactured in any other place than CH, think again! They aren't made in the US..

Despite the bad rep it mainly down to ignorance as they are in the main absolutely fine.

Try and stick with a branded version like; JCPOWER or MEANWELL.

Just parrallel up what you need 3x500W or 2x750W or whatever.

24V will adj down to 18V.

Btw, you're looking for a power supply for your linear, not a linear power supply as that's an analogue, i.e. not switching lump with a massive transformer etc.

Str.

Agreed.  Why the strange voltage?  Most switchers are adjustable to some degree, but 18 is not a standard voltage.  A 24V supply should have enough range to drop to 21V or so, but that's about it.

+-RH
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Please send QSL's and reception reports to xfmshortwave [at] proton [d0t] me

Offline TRI International

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Re: Looking for Linear Power Supply
« Reply #5 on: March 10, 2021, 1934 UTC »
Thanks for all the info to be clear I need to connect it to a power supply. (Nothing wrong with the amp it self lol)

Got it as a birthday gift  the person that got it just thought you buy it hook it up to the battery and go but not the case  :'(
We need another card to shut out the draught HW ABT URS?
Use Shazam app. to ID songs, listening direct Airspray RTL SDR , Ham It UP Plus connected to 2 V shape long wires  40ft. high with a MFJ 941C Antenna tuner
QSL to trlinternational@yahoo.com or  trlinternational@protonmail.com

Offline Stretchyman

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Re: Looking for Linear Power Supply
« Reply #6 on: March 10, 2021, 2016 UTC »
I agree on the 'Wierd voltage?'

Model number or piccies??

Str.
'It's better to give than receive' so why Rx when you can Tx!

                                              ;)

Offline TRI International

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Re: Looking for Linear Power Supply
« Reply #7 on: March 10, 2021, 2039 UTC »
MEAN WELL SP-750-24 SERVO STEPPER MOTOR Switching Power Supply DC 24V 31.3A 750W
We need another card to shut out the draught HW ABT URS?
Use Shazam app. to ID songs, listening direct Airspray RTL SDR , Ham It UP Plus connected to 2 V shape long wires  40ft. high with a MFJ 941C Antenna tuner
QSL to trlinternational@yahoo.com or  trlinternational@protonmail.com

Offline Stretchyman

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Re: Looking for Linear Power Supply
« Reply #8 on: March 10, 2021, 2103 UTC »
Pic of the amp please...

MEANWELL(while)!!

Pair of those will do nicely

Str.
« Last Edit: March 10, 2021, 2105 UTC by Stretchyman »
'It's better to give than receive' so why Rx when you can Tx!

                                              ;)

Offline TRI International

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We need another card to shut out the draught HW ABT URS?
Use Shazam app. to ID songs, listening direct Airspray RTL SDR , Ham It UP Plus connected to 2 V shape long wires  40ft. high with a MFJ 941C Antenna tuner
QSL to trlinternational@yahoo.com or  trlinternational@protonmail.com

Offline redhat

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Re: Looking for Linear Power Supply
« Reply #10 on: March 10, 2021, 2335 UTC »
I think we're more interested in the amplifier itself, i.e. why the strange voltage requirement.  Most stuff is going to expect either 12 or 24VDC for supply.  I've never seen anything RF related that required 18-20VDC.
+-RH
Somewhere under the stars...
Airspy HF+, MLA-30/Mini-whip/Chi-Town Loop
Please send QSL's and reception reports to xfmshortwave [at] proton [d0t] me

Offline TRI International

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Re: Looking for Linear Power Supply
« Reply #11 on: March 10, 2021, 2338 UTC »
here are the Specification :

Power Input       =  30-100 Watt SSB
Output Power    =  800 Watt
Voltage              =  17-20 Vdc
Transistor          =  8 units IRFP150N  ( Many in Ebay for $ 2 each )
Frequency         =  2 Band 3,5-14 Mhz,
                              3.8Mhz = 600 Watt , Peak
                              7 Mhz = 800 Watt.  Peak Power
                              11 Mhz = 500 Watt, Peak
                              14 Mhz = 300 Watt , Peak
We need another card to shut out the draught HW ABT URS?
Use Shazam app. to ID songs, listening direct Airspray RTL SDR , Ham It UP Plus connected to 2 V shape long wires  40ft. high with a MFJ 941C Antenna tuner
QSL to trlinternational@yahoo.com or  trlinternational@protonmail.com

Offline redhat

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Re: Looking for Linear Power Supply
« Reply #12 on: March 10, 2021, 2339 UTC »
here are the Specification :

Power Input       =  30-100 Watt SSB
Output Power    =  800 Watt
Voltage              =  17-20 Vdc
Transistor          =  8 units IRFP150N  ( Many in Ebay for $ 2 each )
Frequency         =  2 Band 3,5-14 Mhz,
                              3.8Mhz = 600 Watt , Peak
                              7 Mhz = 800 Watt.  Peak Power
                              11 Mhz = 500 Watt, Peak
                              14 Mhz = 300 Watt , Peak

Oh god no...

Do the innerds look like this?


Another piece of sound advice...don't buy semiconductors off ebay.  Many times the devices are restamped versions of smaller devices and they will fail prematurely...especially if the come from overseas.

+-RH
« Last Edit: March 10, 2021, 2344 UTC by redhat »
Somewhere under the stars...
Airspy HF+, MLA-30/Mini-whip/Chi-Town Loop
Please send QSL's and reception reports to xfmshortwave [at] proton [d0t] me

Offline TRI International

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Re: Looking for Linear Power Supply
« Reply #13 on: March 11, 2021, 0042 UTC »
Not sure the person said he got if off of ebay here is the name on ebay
Booster Amplifier HF SSB 800W Amateur 80m 40m 20m Peak 7Mhz Low Pass Filter
We need another card to shut out the draught HW ABT URS?
Use Shazam app. to ID songs, listening direct Airspray RTL SDR , Ham It UP Plus connected to 2 V shape long wires  40ft. high with a MFJ 941C Antenna tuner
QSL to trlinternational@yahoo.com or  trlinternational@protonmail.com

Offline redhat

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Re: Looking for Linear Power Supply
« Reply #14 on: March 11, 2021, 0100 UTC »
I saw the pics...I wouldn't put that on the air if I were you.  It also isn't built with enough heatsink to be reliable.
Somewhere under the stars...
Airspy HF+, MLA-30/Mini-whip/Chi-Town Loop
Please send QSL's and reception reports to xfmshortwave [at] proton [d0t] me

 

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