New model of BG7TBL noise source

[abcd567]

@SoNic67

feeding the whole device with only 5V will make it work really poorly (if at all).

My experience (and other’s as well) is that feeding the device at 12V DC converted this device into a frying pan (unless you add a cooling fan).

At 5V DC it not only stayed nominally hot, but also performed good.

.

Roll your own Interdigital filter

Yes a BG7TBL but running at 5v rather then 12v due to overheating problems. Gain setting was Auto (I think?). I’ll try brass nuts and bolts. I’ll re-run the scans this evening and make a note of all the settings and compare against the coax stub filter.

.
.

Low Cost Signal Generator (35Mhz-4.4Ghz) for antenna testing

The coupler looks good but maybe one like this would be better for a low powered signal source. Not sure about the signal generator, its a bit expensive for my tastes . I found the cheap ebay noise source quite effective but it definitely needs a small $3 fan, I can understand why yours expired from over heating as mine runs crazy hot without it. Maybe running at less than 12v volts would help, must try one day.

.