26-08-2015, 07:06 PM
That's a very useful doc Alan - what a shambolic state of affairs though, given the wide range of I frequencies back in the 30s/40s!
It would be rather nice (well I think so anyway), to have a design for a micro-transmitter that uses valves, along the lines of those ubiquitous Chinese 'Little Bear' valved headphone/pre-amp amplifiers.
A bit like this sort of thing. They run in 12V and I assume they have a tripler or some such thing to raise the voltage for the HT:
http://www.ebay.co.uk/itm/like/291244381244?adgroupid=&hlpht=true&hlpv=2&rlsatarget=&adtype=pla&ff3=1&lpid=122&poi=&ul_noapp=true&limghlpsr=true&ff19=0&device=c&chn=ps&campaignid=&crdt=0&ff12=67&ff11=ICEP3.0.0-L&ff14=122&viphx=1&ops=true&ff13=80
Yes, I know they're not to everyone's liking, but I think they look quite dinky.
It would be rather nice (well I think so anyway), to have a design for a micro-transmitter that uses valves, along the lines of those ubiquitous Chinese 'Little Bear' valved headphone/pre-amp amplifiers.
A bit like this sort of thing. They run in 12V and I assume they have a tripler or some such thing to raise the voltage for the HT:
http://www.ebay.co.uk/itm/like/291244381244?adgroupid=&hlpht=true&hlpv=2&rlsatarget=&adtype=pla&ff3=1&lpid=122&poi=&ul_noapp=true&limghlpsr=true&ff19=0&device=c&chn=ps&campaignid=&crdt=0&ff12=67&ff11=ICEP3.0.0-L&ff14=122&viphx=1&ops=true&ff13=80
Yes, I know they're not to everyone's liking, but I think they look quite dinky.
Regards, David.
BVWS Member.
G-QRP Club Member 1339.
'I'm in my own little world, but I'm happy, and they know me here'
BVWS Member.
G-QRP Club Member 1339.
'I'm in my own little world, but I'm happy, and they know me here'
