07-10-2012, 04:58 PM
well i have had time to do a bit more today.decided to plug in via lamp limiter.ht rose to 310 volts with slight hum from speaker ht checked at output tx.
some thing wrong as ht should be 235 volts!.
next check was R37 on alans circuit it was of coase o/c.
i did not have a 1k5 wire wound so fitted a 1k8.
power on again ,better this time ht 250 volts and some life from the speaker .
swiched to mw band and stations picked up at least at the low end of the band.
tried lw radio 4 and one other recived.
sw and trawler bands dead.
one other thing audio output not what it should be quality not bad .
if volume wound past 3/4 output goes unstable.
i am not shore the rs output tx is conected correctly.
i have not as yet tested any of the valves and the speaker i am useing is 6 ohms.
so a lot more work to be done .
rob t
some thing wrong as ht should be 235 volts!.
next check was R37 on alans circuit it was of coase o/c.
i did not have a 1k5 wire wound so fitted a 1k8.
power on again ,better this time ht 250 volts and some life from the speaker .
swiched to mw band and stations picked up at least at the low end of the band.
tried lw radio 4 and one other recived.
sw and trawler bands dead.
one other thing audio output not what it should be quality not bad .
if volume wound past 3/4 output goes unstable.
i am not shore the rs output tx is conected correctly.
i have not as yet tested any of the valves and the speaker i am useing is 6 ohms.
so a lot more work to be done .
rob t
if its made by hand it can be repaired by hand
