Fisher MX-65 Multiplexer Diode Module vs Discrete

[sony6060]

I seen a Fisher 400 30000 series and the MX-65 has four diodes in a module vs separate diodes. The module has a Fisher part number V50260-130 & on back side number B8750E.

My later model Fisher 400 with the MX-65 multiplexer has the discrete diodes.

Anyone know the history?

 

[dcgillespie]

Sony -- On all the Fishers I've worked on, the discrete diodes were typically in the earlier tuner/receivers, while the modules were typically in the later units. However, since the MPX units were built separate from the tuner/receivers, the production of a given tuner/receiver versus production of a given MPX unit may not have always resulted in the latest MPX chassis in the latest tuner/receiver. Just my two cents....

Dave

 

[sony6060]

Thanks Dave. Likely that early Fisher multiplexer was serviced with the later parts.

 

[larryderouin]

Up to the 48001 manual the CR102-CR103 diodes are shown on the scat as 4 diodes "WITHOUT" a dotted box surrounding them (indicating separate diodes). The 48001 manual shows them as a unit (dotted box....ie: a PEC.) but with the same part #.

So what dave said is possible, but it's also possible the original got replace with a newer version during a shop visit too.

Larry

 

[sony6060]

Thanks Larry. You have a tremendous amount of knowledge on these Fishers. Perhaps write a book? I would buy it.

 

[larryderouin]

I spend more time editing what I write here to make it comprehensible, than I do writing the original post.

Everything I learned about FiSHER's, about 90% of it was gotten from here, the rest reading the Service/Owners manuals for them.

 

[sony6060]

I spend more time editing what I write here to make it comprehensible, than I do writing the original post.

Everything I learned about FiSHER's, about 90% of it was gotten from here, the rest reading the Service/Owners manuals for them.

You have all the data in your head. That is a lot of time and a load of details.