Message	Date	From	Subject
9863	2014-03-24 09:15:30	johnjdignan	Help with a VHF broadband amplifier and filters?
HI All, I'm having a major 'bitx' rebuild and need some help with the final VHF stages. I'm looking for a schematic for a broadband amp that will cover 50MHz,70MHz and through to 148Mhz, it will need to be suitable for FM & SSB Ideally I'd like an output of around 25 watts(ish). More would be better, but I'd settle for a minimum of 10. I've around 100mw to drive it (although I could add another stage for more if need be) and have upto 28V@10amps (or any other voltage below ) to power it. So if anyone has a circuit lying around please send me a link or email ( johnjdignan 'at' yahoo dot com ) I'd also like some schematics for band pass & low pass filters for the 6M 4M &2M bands, I've have had a go at making some, from a design by a friend, but alas, the insertion loss is just whey too high. Once again, if anyone can help I'd be mighty grateful! 73's de John M0JJD

HI All,

I'm having a major 'bitx' rebuild and need some help with the final VHF stages. I'm looking for a schematic for a broadband amp that will cover 50MHz,70MHz and through to 148Mhz, it will need to be suitable for FM & SSB

Ideally I'd like an output of around 25 watts(ish). More would be better, but I'd settle for a minimum of 10. I've around 100mw to drive it (although I could add another stage for more if need be) and have upto 28V@10amps (or any other voltage below ) to power it. So if anyone has a circuit lying around please send me a link or email ( johnjdignan 'at' yahoo dot com )

I'd also like some schematics for band pass & low pass filters for the 6M 4M &2M bands, I've have had a go at making some, from a design by a friend, but alas, the insertion loss is just whey too high.

Once again, if anyone can help I'd be mighty grateful!

73's de John M0JJD