I have had the radio now for a couple of days, it arrived quicker than expected and well ahead of the dummy batteries which have not shown up as yet (despite being sent via Amazon Prime) meaning to get the voltage required I've had to fit 10 normal AA batteries with two of them insulated by tape to remove them from the circuit and a wire to jump the last in-circuit battery to the negative terminal, the batteries in the radio are two of the 10 Duracell batteries that were in it on delivery taped over to remove them from circuit and 8 Kodak batteries from Poundland, the radio indeed has an intact telescopic and seems to transmit and receive fine.
After filming the attached video I found out when this radio dates from, if I have read the date code correctly it is from September 1987, making this radio 33 years old and aside from a crack in the housing it is in very good order.
With the non-standard external antenna connector I cannot get even a rough power measurement off it because I need an adaptor and I will have to call Knights on Monday to see if they have any in, though they list them on their website as limited stock it is best I check ahead.
On Wednesday I hope to put up the boomerang antenna, connect it up to the President Grant II and go up to the Downholme viewing point with the Realistic and the modern Intek and Midland handhelds I also own which will be tested on both the supplied rubber duck antennas and the Albrecht CL27 with the Realistic using its own telescopic which is longer than the CL27, which will be filmed and uploaded to YouTube
In the mean time though here is the video on this radio not long after it arrived
73 de M0WNU/26CT730