Compatibilty problems with 300w amp & LPF?
- teckniqs
- proppa neck!
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Re: Compatibilty problems with 300w amp & LPF?
A dummyload is a 50 ohm load and is fine without the cap, it's the colinear antenna you need to watch.
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- who u callin ne guy bruv
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Re: Compatibilty problems with 300w amp & LPF?
I was just going by what broadcast concept said on there website about the LPF
https://broadcastconcepts.com/150W-FM-LPF.html
https://broadcastconcepts.com/150W-FM-LPF.html
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Re: Compatibilty problems with 300w amp & LPF?
Good morning nrg-uk,nrg-uk wrote:I was just going by what broadcast concept said on there website about the LPF
https://broadcastconcepts.com/150W-FM-LPF.html
Gosh I had no idea that these LPF were only rated at 150w continuous and are just marked at 500w short term peak like a Chinese Hi-Fi PMPO!
Thankfully I never purchased them and I think that's a joke how they mark them up as 500w but sell them as a 150w unit.
I have a Dutch RF Shop 300w amplifier which has the exact same SMT caps as this 150w LPF but the coils are thinner on the LPF. Do you think I should upgrade the coils to a thicker SWG or change the caps?
I appreciate you pointing this out, cheers ELo
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Re: Compatibilty problems with 300w amp & LPF?
Cheers Analyser,Analyser wrote:Just to add my 2p into this thread again. The low pass filter in the pictures is fine, even for 500w. If you put too much power in to a filter either the coils get really hot or the capacitors explode, it won't cause a mismatch within a few seconds and blow the PA.
Broadcast concepts stuff is quite good but looking at the pictures of the Spanish stuff I'm not that impressed.
I am a bit concerned with it being only rated at 150w continuous and with Broadcast Concepts featuring a high powered version which is still only rated at 250w. But as I previously said to the last poster I have another (300w) amp with the same capacitors on it.
When I get around to it I will replace the two transistors for another matched pair, in the meantime I'll be working on further projects and come back to this at a later date.
I highly appreciate all your help, I'm sure it won't be long until I'm back again.
With thanks, eLopiD
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