FL2100B Schematic Diagram

[benvindo]

I have a FL2100B linear from Yaasu that the schematic diagram is not equal to the original 2100B, it has the PB1903 board that belongs to the 2100Z, does anyone know to get such schematic diagram for the 2100B. It was made originally in the Yaesu factory and is not documented,
Where to get the circuit diagram that is a mix of 2100B and 2100Z

 

[Shockwave]

You might find this info from Tom useful FL2100 Yaesu Oscillation

 

[2RT307]

I'd try the fox tango site.

Fox Tango Yaesu Amplifier page

VERY helpful group of folks there that really know the Yaesu's inside and out.

73,
Brett

 

[Captain Kilowatt]

I can find the manuals with schematics for the 2100B and the 2100Z but no info nor anything at all about a hybrid of the two. No mention whatsoever.

 

[Shockwave]

Is there a problem with the amp that you are trying to fix? If so describe it and I'm sure you'll find assistance here. PB-1903 is the bias control board for a later version FL-2100Z. The FL-2100B and earlier versions were known to have bias problems. Back then, Yaesu also stocked a vast inventory of replacement parts that often lasted 10 to 15 years after a unit was no longer in production.

The majority of extra PB-1903 boards that Yaesu stocked did not get used to replace defective bias boards in FL-2100Z's. Crafty owners often ordered them for their FL-2100B's and installed the upgraded bias boards in the older amps. It is not likely this unit came from the factory like this but it is possible it went back to factory service to install the board.

 

[benvindo]

I saw the answers, thanks for the help, I tought that my FL2100B could be from the last made from Yaesu, before they begin to make the 2100Z, my was buyed from the Yaesu dealer in Brazil in Manaus, it was original from factory. The PB1903 looks the same from FL2100Z, but it does not use two relays, RL1 and RL2 as the 2100z. I imagine that Yaesu may have emited a Service Note about that. Really I did not find nothing about it.