What are the best trans.for a RM KL-203P AMP ???
- WARLOCK
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What are the best trans.for a RM KL-203P AMP ???
Having blown my RM KL203P amp can anyone put forward some better more powerful trans, ???
- Mudslinger
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Re: What are the best trans.for a RM KL-203P AMP ???
Not sure about more powerful but knights did list the original RM3's.
I think you can use IRF520's as well.
I think you can use IRF520's as well.
Mudslinger - Simon
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There is no such thing as a Fidelity 1000 which is too good to scrap.
Re: What are the best trans.for a RM KL-203P AMP ???
Hi warlock use irf520's and don't overdrive them ie 5watts max am/fm Input to amp gd luck . Cheers n'73's
- listner132
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Re: What are the best trans.for a RM KL-203P AMP ???
I have changed the fets from the origonal rm3 fet i have tried both fqp13n10,s and also irf520's both replacments work ok but the power is about 30 watts less that what it was with its origonal fets..
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Re: What are the best trans.for a RM KL-203P AMP ???
I read something identical to this somewhere else just yesterday. Someone said they were probably poor, cheap replacements and someone else saying the bias needed tweaking to get better results whatever that is if it has one???
Try searching on this site to see if there's relevant info available.
dt307 may be the chap to contact as I think he's good with amp's
Try searching on this site to see if there's relevant info available.
dt307 may be the chap to contact as I think he's good with amp's
- dt307
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Re: What are the best trans.for a RM KL-203P AMP ???
https://www.moonraker.eu/rm-mospower-rm3 not realy expensive less than a tenner to get the amp backup and running at correct power levels and the correct transistors.
fqp13n10 work fine but power is down to about 110w i fit theese because i have loads
https://www.mouser.co.uk/ProductDetail/ ... aoQAvD_BwE
or send me a pm and i post you 4 free .....not exactly gonna kill me or leave my self short
if5520n the "N" is for Never gonna sound good .....if you must use the irf520 non n
BTW save your self some pain if you dont have the skills/tools to remove the old ones correctly.
snip the old fets off at the body of the transistors and solder new ones directly to the legs of the old ones.
or if you must unsolder them same snip off the transistors at the body and unsolder 1 leg at a time and if there is any solder in the holes run a hand drill through them
https://www.amazon.co.uk/FOCCTS-Holding ... 0654&psc=1
fqp13n10 work fine but power is down to about 110w i fit theese because i have loads
https://www.mouser.co.uk/ProductDetail/ ... aoQAvD_BwE
or send me a pm and i post you 4 free .....not exactly gonna kill me or leave my self short
if5520n the "N" is for Never gonna sound good .....if you must use the irf520 non n
BTW save your self some pain if you dont have the skills/tools to remove the old ones correctly.
snip the old fets off at the body of the transistors and solder new ones directly to the legs of the old ones.
or if you must unsolder them same snip off the transistors at the body and unsolder 1 leg at a time and if there is any solder in the holes run a hand drill through them
https://www.amazon.co.uk/FOCCTS-Holding ... 0654&psc=1
163dt307-chris
“I fear the day that technology will surpass our human interaction. The world will have a generation of idiots.”
― Albert Einstein
“I fear the day that technology will surpass our human interaction. The world will have a generation of idiots.”
― Albert Einstein
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Re: What are the best trans.for a RM KL-203P AMP ???
I have tested several different fets and 48w IRF510 or IRF520 works. 520 less power then 510.
IRLZ14 and IRLZ24 works fine.
I have build diy fet amp 2drive 16fet @27v same fets and it work great.
IRLZ14 and IRLZ24 works fine.
I have build diy fet amp 2drive 16fet @27v same fets and it work great.
Paljon pilalle tinailtuja koneita.
Mobile. Ham concorde3, Megawatt 4000,Zetagi B550p.
Home. Colt Excalibur SSB , 2el Quad, Diy ldmos amp 1.6kw pep.
Mobile. Ham concorde3, Megawatt 4000,Zetagi B550p.
Home. Colt Excalibur SSB , 2el Quad, Diy ldmos amp 1.6kw pep.
- Unit 148 Mobile
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Re: What are the best trans.for a RM KL-203P AMP ???
Pienari,
Tell us more about both of your homebrew amp's the 16 fet unit and the 5kW one in your profile?
I have a US made 16 x Toshiba (originals) 2SC2879 mobile amp that runs luke warm at 1500W pep out and can easily run 2kW+ with a stiff 16V power supply.
Unit 148 - G4ZOW
Tell us more about both of your homebrew amp's the 16 fet unit and the 5kW one in your profile?
I have a US made 16 x Toshiba (originals) 2SC2879 mobile amp that runs luke warm at 1500W pep out and can easily run 2kW+ with a stiff 16V power supply.
Unit 148 - G4ZOW
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Re: What are the best trans.for a RM KL-203P AMP ???
Yep its not 5kw,maybe i have to add 0 before ,5kw.
So that 2+16fet amp output is 500w dead key 10w drive and 1kw pep ssb @27.2v.
Boards are my own desing and build.
I got option to chance 2+20fet boards later.
I bought burned kl-503 and all fets was burned.
Maybe i mod this unit to 24v.
So that 2+16fet amp output is 500w dead key 10w drive and 1kw pep ssb @27.2v.
Boards are my own desing and build.
I got option to chance 2+20fet boards later.
I bought burned kl-503 and all fets was burned.
Maybe i mod this unit to 24v.
Paljon pilalle tinailtuja koneita.
Mobile. Ham concorde3, Megawatt 4000,Zetagi B550p.
Home. Colt Excalibur SSB , 2el Quad, Diy ldmos amp 1.6kw pep.
Mobile. Ham concorde3, Megawatt 4000,Zetagi B550p.
Home. Colt Excalibur SSB , 2el Quad, Diy ldmos amp 1.6kw pep.