UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Midland 77-805 Portapak transmit issue

Techman · 4th Oct 2019, 1:54 am

Only just spotted this thread.

Perhaps the aerial has been broken and repaired at some time and been shortened?

I use one of these in the car sometimes and they're quite happy running at alternator charging voltage straight into the power socket on the rear. I remember when I had run it once as a 'portable' years ago with some not very good rechargeable cells, and it was very sensitive to the bad internal impedance of these and would go unstable on transmit after a short while, so they need good batteries/cells.

I've just located the telescopic antenna from mine (took some finding as I'd forgotten where it was) and fully extended it's sixty and three quarter inches (or just over 154 cm) from the very end of the thread to the tip of the antenna.

I may not be able to get on the 'net for the next couple of days, so good luck with it and hope you get it sorted.

4th Oct 2019, 1:54 am	#13
Techman Dekatron Join Date: Nov 2009 Location: Lincolnshire, UK. Posts: 5,000	Re: Midland 77-805 Portapak transmit issue Only just spotted this thread. Perhaps the aerial has been broken and repaired at some time and been shortened? I use one of these in the car sometimes and they're quite happy running at alternator charging voltage straight into the power socket on the rear. I remember when I had run it once as a 'portable' years ago with some not very good rechargeable cells, and it was very sensitive to the bad internal impedance of these and would go unstable on transmit after a short while, so they need good batteries/cells. I've just located the telescopic antenna from mine (took some finding as I'd forgotten where it was) and fully extended it's sixty and three quarter inches (or just over 154 cm) from the very end of the thread to the tip of the antenna. I may not be able to get on the 'net for the next couple of days, so good luck with it and hope you get it sorted.