29-10-2018, 05:06 PM
Hi.
Well the V410 doesn't have LOPT issues. The lack of width, decaying EHT and poor focus was down to low line drive and distorted drive waveform. The line oscillator on all these barrel sets use 10% tolerance resistors, no doubt for good reason. In the V410 all the resistors were way out of the 10% tolerance with two high value ones 30% high. Replacing all of the resistors gave me an increase of 20v p-p drive and a correctly shaped waveform as in the manual. The capacitors had previously been replaced as had the 30P4 screen feed resistors. A three hour run over the weekend and about four today showed up no line problems, the LOPT runs noticeably cooler.
The set does need realignment as the phantom twiddle has broken all the cores, sound and vision are not correct, sound is good and vision is well off and vice versa, there is also bad ringing on vision too.
Any good ideas how to extract chewed up hex dust cores?
Well the V410 doesn't have LOPT issues. The lack of width, decaying EHT and poor focus was down to low line drive and distorted drive waveform. The line oscillator on all these barrel sets use 10% tolerance resistors, no doubt for good reason. In the V410 all the resistors were way out of the 10% tolerance with two high value ones 30% high. Replacing all of the resistors gave me an increase of 20v p-p drive and a correctly shaped waveform as in the manual. The capacitors had previously been replaced as had the 30P4 screen feed resistors. A three hour run over the weekend and about four today showed up no line problems, the LOPT runs noticeably cooler.
The set does need realignment as the phantom twiddle has broken all the cores, sound and vision are not correct, sound is good and vision is well off and vice versa, there is also bad ringing on vision too.
Any good ideas how to extract chewed up hex dust cores?
