Topband: End of a bias tee adventure?

2014-01-24 Thread Pete Smith N4ZR
After making all of the recommended changes, I hooked up my MFJ and got 650 readings regardless. When connected to a 75 ohm dummy load, it reads completely normally, as does shorting the input (R=0_ If I had managed to damage the MFJ with DC voltage on the input, would you expect no readings

Re: Topband: End of a bias tee adventure?

2014-01-24 Thread Bruce
@contesting.com Sent: Friday, January 24, 2014 9:57 AM Subject: Topband: End of a bias tee adventure? After making all of the recommended changes, I hooked up my MFJ and got 650 readings regardless. When connected to a 75 ohm dummy load, it reads completely normally, as does shorting the input (R=0_ If I

Re: Topband: End of a bias tee adventure?

2014-01-24 Thread Bruce
...@myfairpoint.net Sent: Friday, January 24, 2014 11:16 AM Subject: Re: Topband: End of a bias tee adventure? I would like to know which diode because mine is doing the same thing. There is nothing in the manual on how to calibrate it either. 73 Hardy N7RT - Original Message - From

Re: Topband: End of a bias tee adventure?

2014-01-24 Thread Mike Waters
I would like to know where to get those diodes! Right after I bought my last MFJ-259B, I e-mailed MFJ about buying a spare or two just in case. They never replied. Anyone have a Mfg. name and P/N? 73, Mike www.w0btu.com On Fri, Jan 24, 2014 at 9:49 AM, Bruce k...@myfairpoint.net wrote: Years

Re: Topband: End of a bias tee adventure?

2014-01-24 Thread Tod Olson
Is no one going to suggest that a ³gyrator² should be put into the circuit instead of an inductor? There was a W3 who had some of the diodes for replacements. They are surface mount and small! Obviously, one wants them to have a very low conduction threshold voltage. I suspect Tom can suggest

Re: Topband: End of a bias tee adventure?

2014-01-24 Thread Tom W8JI
After making all of the recommended changes, I hooked up my MFJ and got 650 readings regardless. When connected to a 75 ohm dummy load, it reads completely normally, as does shorting the input (R=0_ If I had managed to damage the MFJ with DC voltage on the input, would you expect no readings