XHDATA D-808 modification to allow an external mediumwave antenna

by
Thomas
from The SWLing Post on (#3CR7A)

XHdata-D808.jpg

Many thanks to SWLing Post contributor, Rolf Snijder, who writes:

I have added an external antenna capability for mediumwave on the XHData D-808.

Simply add a 27 pF capacitor on the backside of the PCB on C10 to the the ferrite antenna.

XHDATA-D-808-External-Antenna-ModificatiXHDATA-D-808-External-Antenna-Modificati

The mod causes no loss on FM or shortwave!

I also replaced the Ferrite antenna with a bigger one so I now have more performance on MW!

XHDATA-D-808-External-Antenna-Modificati

Longwave is not good in my radio, even with an external antenna, it is not performing well.

Thanks once again, Rolf! I must assume that the Digitech AR-1780 could be modified in the same way as the radios appear to be near identical. Perhaps someone can verify this at some point!

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Reply 1 comments

Wow, impressive! (Score: 0)

by Anonymous Coward on 2019-07-15 19:30 (#4K778)

How did you know 'where' to put the capacitor - trace the MW antenna circuit?
I"m assuming NO on the following questions but can't 'see' from here so am asking:
Does this modification 'connect' the built in AM antenna to my shortwave external antenna when it's plugged into the jack?
If I do this - will I now have overload potential with the external antenna (can it handle my AM Loop)?
Thanks in advance; and thanks for sharing this mod!