03-24-2013, 06:11 PM
I have a Crosley 148 and I think I'm pretty close to getting it fully functional (I think) it was completely dead when I started but I'm stumped so here is my data.
socket voltages going across the way the print is laid out. Vol was at max the gang was closed
58osc - 249, 112, 44, 2.6, 2.5
58IF - 288, 153, 0, 4.2, 2.5
57det - 180, 64, 0, 16, 2.5
42op - 257, 272, 0, 22, 6.9
The ones that stand out to me is the 57 both the screen and bias are very high?
I've changed all the caps and resistors the vol pot goes from 170ohms to 5.3k looked at posts on the antique forum and this looks to be correct
I checked for open coils and they look good
when I connect the ant I I get tone like it was hooked up to a sig gen but faint and only when the vol is about 1/4 if I go higher it goes away.
If I connect a ant wire to the grid cap of the 58osc (also top of gang) I get stations the vol has to be turned up more than 50% and even at max it is not as loud as it should be.
Any ideas on what to look at next??
Riders Volume 3 - CROSLEY 3-26
http://www.nostalgiaair.org/Resources/276/M0003276.htm
Eric
socket voltages going across the way the print is laid out. Vol was at max the gang was closed
58osc - 249, 112, 44, 2.6, 2.5
58IF - 288, 153, 0, 4.2, 2.5
57det - 180, 64, 0, 16, 2.5
42op - 257, 272, 0, 22, 6.9
The ones that stand out to me is the 57 both the screen and bias are very high?
I've changed all the caps and resistors the vol pot goes from 170ohms to 5.3k looked at posts on the antique forum and this looks to be correct
I checked for open coils and they look good
when I connect the ant I I get tone like it was hooked up to a sig gen but faint and only when the vol is about 1/4 if I go higher it goes away.
If I connect a ant wire to the grid cap of the 58osc (also top of gang) I get stations the vol has to be turned up more than 50% and even at max it is not as loud as it should be.
Any ideas on what to look at next??
Riders Volume 3 - CROSLEY 3-26
http://www.nostalgiaair.org/Resources/276/M0003276.htm
Eric
