Model 600 Schematic/Parts List Question

[audmod01]

I have been working on cleaning up and annotating the schematic for the Fisher model 600, their first tube type AM-FM Multiplex receiver. On the schematic page 3 a capacitor identified as C149 is shown connected to pin-6 of V10 the 6FG6/EM84 eye tube for the AM circuitry. It is shown close to the S2 Section 1 Rear wafer on the schematic. In the parts list there is no C149 shown. I also noted that there is no similar capacitor shown associated with V6, the 6FG6/EM84 associated with the FM circuitry. I also looked at the 800-B schematic and there is no similar capacitor shown on either the AM or FM eye tube circuits. There is a single bypass capacitor, C44, in the 800-B which bypasses the B+ going to both the AM and FM eye tubes. However in the 800-B, C44 is on the B+ side of the two 470K ohm Plate Load Resistors for both tubes, not tied directly to pin 6 of either tube.

Does C149 in the model 600 really exist? If so it is unique to the model 600. What is its value if it is in the unit?

I am beginning to think that C149 is shown on the schematic in error and does not exist, hence its absence from the actual parts list.

Joe

 

[gadget73]

Which series of 600, and do you have the schematic that matches it? There are I believe 5 different ones.

 

[larryderouin]

Yep! 5 different versions 10001-19999,20001-29999, 30001-39999,40001-49999 All 7199 driver versions.
50001 to 59999 is the last version and uses 7247's as drivers.

According to the 50001-59999 manual, C149,C150 are Ceramic, .005uuf, 20%, 500v Fisher Part # C50089-1
C149 is also present in the parts list on the 20001, & 40001 manuals. I don't have a 30001 manual yet.
C149 is NOT PRESENT in the parts list on the 10001 manual. You can write it in with C67 as it's the same part # and is the last instance of this part before C149.

The 4 available manuals are on FISHERCONSOLES Site. Scroll down to 600 Receiver and pick the one that matches your serial #. http://www.fisherconsoles.com/service owner manual list.html

 

[audmod01]

Guys, sorry it is the first one 10000 to 19999.

 

[larryderouin]

It looks to be a Engineering Dept Error, on the manual. They put C149 on the schematic, but Never got it to the parts list. Later model's had it on the schematic and parts list as noted above.

 

[audmod01]

Larry;

Thanks much! I will look at the next one in the sequence and add C149 to the parts list.

Joe