RadioBanter - View Single Post

August 9th 05, 02:53 AM

wrote:
I have a B&W 51SB-B sideband generator which I use with a 5100-B
transmitter. The generator worked fine until recently, when output from
the grid circuit disappeared. I discovered a faulty resistor and
replaced it, plus I replaced the two 1N34 diodes, which are nearing 50
years old and, I am told, don't age well.

The result: Grid current is up--although it seems to fade on 10
meters--but the output meter indicates far less output than before.
Also, the grid current goes below zero while the B-plus is on, but the
unit is not being modulated (i.e. I'm ot talking). This is an old
problem and I don't know what's causing it. I'm not sure I should worry
about the output, since the unit seems to work and the transmitter
output appears normal.

Is there anybody out there who is thoroughly familiar with these
sideband generators and can answer a few questions?

Thanks in advance for whatever help you can provide.

Steve, W3DEF..... Steve I have the SSb adapter and 5100 ..When you switch to SSB the 5100 grid current is now read on the grid position of the SSB unit..grid current in the 5100 is of no significance in this mode..when you are in CW or AM the 5100 grid meter will read accurately.. If you go to AM and tune up the 5100 you should see abt 60/65 watts out on watt meter..when in SSb you will probably see abt. 75 peak watts.I have never been able to get full power out using the SSB adapter,I have tried several units,they are all low in output..SSB is nice and crisp but lower than I expected.. Good Luck Harold W4PQw