02-04-2014, 03:44 PM
I'm still trying to figure out the orientation of the tickler winding. Is there any chance is corresponds to the picture in the schematic? The other two on this form do.
There is a bit of a mistake on the schematic that messed me up. It's nearly impossible to explain, but looking at the schematic: http://www.philcoradio.com/tech/images/89v3.jpg
Coming off the screen of the first 44, part 8 and 8A are wired in parallel to ground. They are two different parts. One of the blocks also has the .0007 for the 36 cathode bias. The condenser list on that schematic lists the .09 with the .0007, but it's the other way around in the radio. I put them in the wrong blocks, is that a problem? I would redo it, but I used all my spares. The only difference is the 36 bias has a .1 next to it rather than a .05 like it had before.
Last question, for that .0007 bias cap I bought 680pf ceramic caps: http://www.ebay.com/itm/370879275301?ssP...1439.l2649
I've read that ceramics are a bad idea because their values swing under heat. These have a temp coefficient of Y5P, which is 10% tolerance up to 185˚. Is that alright? I can't imagine things are getting that hot under the chassis, but thought it was worth asking.
I hope to rewind the coils tomorrow, that should be everything electronically. Very much looking forward to finally hearing her play.
Thanks,
Will
There is a bit of a mistake on the schematic that messed me up. It's nearly impossible to explain, but looking at the schematic: http://www.philcoradio.com/tech/images/89v3.jpg
Coming off the screen of the first 44, part 8 and 8A are wired in parallel to ground. They are two different parts. One of the blocks also has the .0007 for the 36 cathode bias. The condenser list on that schematic lists the .09 with the .0007, but it's the other way around in the radio. I put them in the wrong blocks, is that a problem? I would redo it, but I used all my spares. The only difference is the 36 bias has a .1 next to it rather than a .05 like it had before.
Last question, for that .0007 bias cap I bought 680pf ceramic caps: http://www.ebay.com/itm/370879275301?ssP...1439.l2649
I've read that ceramics are a bad idea because their values swing under heat. These have a temp coefficient of Y5P, which is 10% tolerance up to 185˚. Is that alright? I can't imagine things are getting that hot under the chassis, but thought it was worth asking.
I hope to rewind the coils tomorrow, that should be everything electronically. Very much looking forward to finally hearing her play.
Thanks,
Will
