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Also I did take a look over at Playthings of the Past's Website and they seem to have what I'm looking for resistor wise (the glass fuse style resistors) but I didn't see any in the 50,000 Ohm rating so I shot the owner a message to see if he could look through his glass resistor stash to see if he had any that were rated for 50,000 Ohms. I'm waiting to hear back from him yet (I sent him a message at 10 o'clock this morning and it is the weekend so I may not hear back until next week sometime). |
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https://antiqueradios.com/forums/vie...things+of+past https://antiqueradios.com/forums/vie...things+of+past Last edited by Kevin Kuehn; 07-24-2020 at 09:49 PM. |
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I'll just have to keep a look out on ebay I guess. |
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I found a box of 47k Ohm 1W 2% tolerance Flameproof resistors that are branded RCA, a package with a 56K Ohm 1W 2% Flameproof Resistor that is Branded Sylvania and I have a package of 56k Ohm 1/2W Carbon Film Resistors that I had left over from when I was restoring my Meck TV last year that either one of those I think should work in this unit. I think I could just solder it under the chassis between the two points where the resistor holder above ties into the circuit and then just leave the old fuse style resistor in the holder above the chassis for appearances sake (I cleaned up the glass housing of the old resistor and I looked inside and it looked like there wasn't anything in there anymore which might explain why it measured open). Does any of these resistors I mentioned stick out as far as one that might work better than the other in this position? Also I found a couple of capacitors in my capacitor stash that might work in place of the old filter caps in the filter supply circuit, one is a 4.7 MFD 250 WVDC Electrolytic and the other is a 2.2 MFD 100 WVDC Electrolytic. Would those work fine in the filter cap positions on this radio seeing as they didn't specify a Working Voltage for the original filter caps? Also the 5,000 Ohm "B" Resistor in this radio's Power Supply/Audio Circuit measures open as well, and I was wondering what kind of wattage of resistor it is, its rather large and looks like it might be a 5 or 10 Watt WW Power Resistor but I'm not sure as it doesn't have any information written on it. Thanks for your help. |
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85v/5000 = 17ma. 85v x 17ma = 1.45watts. So a 5 watt should be very conservative. Everything is ballpark based on the values listed in the Bosch model 28 voltage/current chart and schematic. Last edited by Kevin Kuehn; 07-28-2020 at 01:08 AM. |
Audiokarma |
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