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Here’s a Suped-up Version of the SRF-39FP made for me by Gary DeBock. [see above]
As if the Prison Radio wasn’t already good enough…this 7 Inch loopstick gives it even more bang four the Buck!!
I call this Prison Radio the “Frankensteiner Prisoner” thus the 39FP monicker.
Robert, that’s a great SRF-39FP modification indeed and I bet it improves reception (and nulling abilities) quite dramatically. Plus, it was built by Gary DeBock–no doubt, a quality mod! Thanks for sharing!
“Do what I did a couple of years ago and add a lobster claw rubber band to the [PowerMate] tuning wheel.”
In case you’re not familiar, Mike is referring to the thick, wide rubber bands that are placed on lobster claws to hold them shut. Mike included the following video; you can see that the rubber band fits perfectly around the top of the tuning knob, giving it a little extra grip.
This same type of rubber band can often be found in the produce department of grocery stores as it’s used to hold bunches of broccoli, asparagus and other produce together.
Brilliant! Thanks so much for sharing these, Dr. Phil!
I actually have a Sony ICF-S10MK2, which I consider to be a capable and useful little AM/FM receiver for the sub $20 price. I’ve also been very tempted to purchase an RTL-SDR dongle, so I may go ahead and bite the bullet on one of the NooElec SDR dongles.
“I would like to share something I noticed about Sangean sensitivity issue:
As I own the ATS909, I noticed that with fresh set of regular batteries (1.5V) or it’s power transformer, it is very sensitive.
When the voltage of the batteries drops, so does sensitivity! Which means that if one uses rechargeable batteries (1.2V), the radio will be much less sensitive to begin with.”
Many thanks, Moshe! That is a very good reason to keep fresh alkaline batteries for the 909X, or to run it on a quiet power supply. Moshe is correct–fresh rechargeable batteries can’t deliver full voltage.
Several weeks ago, a reader informed me about a modification that increases SW sensitivity by adding a 4:1 impedance transformer.