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| N_Cook <diverse@tcp.co.uk>: Feb 01 03:14PM chip cap is LV 3.3uF. Going by memory the HF mini transformer looks the same size as reverb tank coils. The next time I have a failed coil I'll try the HV coil of that core, heat separates the ferrite easily. Probably not enough turns for a full replacement job but might give some reverb instead of no reverb. |
| Chuck <chuck@mydeja.net>: Feb 01 07:59AM -0600 There was an AOC tv in the mid 80s that had capacitance touch switches on the front and the channel indicators were illuminated with NE2 neon bulbs. An ic drove transistor switches that turned the bulbs on and off. The sets would come in where the channel couldn't be changed. The first one took me a few hours to repair. The soluton was to change the NE2 bulb on the channel the set was stuck on. The faulty bulbs still lit at the proper voltage. Anyone have an idea how the bulb could cause this fault? At the time we were a high volume repair service so I didn't have the time to ponder circuit anomalies. Thanks. Chuck --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus |
| legg <legg@nospam.magma.ca>: Feb 01 09:48AM -0500 >--- >This email has been checked for viruses by Avast antivirus software. >https://www.avast.com/antivirus Neons emit random noise, dependent on individual breakdown characteristics and current. At some amplitude level or frequency, this could be overloading another section of the circuitry. This could latch up a logic function in one state, if it resulted in positive feedback. You don't indicate if ....one channel was more problematic than others, in a wide range of sets ... or whether it only occurred after some time period set on the problematic channel .... Cold or heat dependent .....same sets returned more than once etc. Without a memory, either mechanical or electronic, this should have been reset on recycling of power. RL |
| N_Cook <diverse@tcp.co.uk>: Feb 01 03:09PM On 01/02/2016 13:59, Chuck wrote: > --- > This email has been checked for viruses by Avast antivirus software. > https://www.avast.com/antivirus And another weird neon problem. My main bench power supply, I've never had to go inside it , so this minor problem remains. The mains-on neon never lights in sunlight or room light but comes on and flashes if its night time and next to no low light in the room, if the ps is left switched on. Its a pip type, only a pip protrudes through the casing if that is relevant. |
| makolber@yahoo.com: Feb 01 06:32AM -0800 > >This past week I was coming from the other direction and clearly saw the street light flash twice, very brightly. red light cam? |
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| schoelman56@gmail.com: Jan 31 12:51PM -0800 Hi-fi engine! |
| schoelman56@gmail.com: Jan 31 12:51PM -0800 Hi-fi engine! |
| Adrian Caspersz <email@here.invalid>: Jan 31 10:44PM > Hi-fi engine! If you mention Hi-fi engine just once more you'll get smacked... -- Adrian C |
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