I have a couple of new 75 Ohm panel mount BNC's from Amphenol if you need one, Specmaster? They came in a joblot.
thanks, I'll get back to you on this, I'll guided by bd139 on if I actually need to do this as he's more in to this more than I am as ham operator.
You don’t need this for aligning radios as you’re probably good enough just loosely coupling the generator to the antenna but it’s a convenience. The panel mount BNCs are on the mark though.
When i calibrate a receiver I’ve built i use a BNC patch with a 50 ohm through terminator plugged into the receiver’s antenna port. Either that or it’s perfectly acceptable to literally just stuff a bit of wire around the antenna and plug that into the generator. As long as you have gobs of the fundamental then you’re good.
There’s a surprising lack of science when it comes to RF sometimes
Edit: typical RX calibration for SSB/CW on 7Mhz.
1. Stuff a bit of wire in the antenna hole and into the generator
2. Set for 7.1MHz mid band, tune it and adjust front end filter for loudest signal.
3. Set for 7.2MHz top end of band, set VFO control to highest frequency, tune VFO centre for signal
4. Set for 7.0MHz bottom end of band, set VFO control to lowest frequency, tune VFO span for signal
5. Repeat 3/4 until it’s about right.
6. Loosely couple marker generator to antenna.
7. Set on 1MHz and tune VFO centre on low tuning again for 7.0MHz.
8. Set on 100KHz and draw the 100KHz marks on the dial
9. Set on 10KHz and draw the 10KHz marks on the dial
Sorted