Next time I will visit the OZ9QV grabber "Thor's Hammer" there will be another band active in grabbing : 80m
I have finished encasing a modified RockMite 80 (RX only)
Frequency drift is acceptable :
10 deg C : 3499.955
23 deg C : 3499.915
Yes - negative temp coefficient.
Since the temperature is expected to be within that range (most likely 15 - 25 for the majority of the time, and I expect to put the RX and PC into a cupboard, I would expect the local oscillator to stay within 3499.925 +/- 10 Hz for most of the time, quite acceptable.
The addition of another band to the grabber is worth it alone, I think.
New antenna needed as well.
I know that more activity is on 40m by now, but the winter should be good for 80m experiments.
The grabber is expected to run with an older, low powered PC, together with the 10 MHz grabber.
The new grabber receivers should be installed before the end of the year.
I am playing with an idea for a more stable grabber receiver for 3500/7000/14000 kHz, more on that later.
It will be a bit more complicated to build, so I will be taking my time.
An Old but Cool DiFX: The Epiphyte - I've been hearing about this rig for many years. It first appeared in the September 1994 issue of QRPp, the journal of the NORCAL QRP club. A condensed v...
22 hours ago