VK3BL Rack… Icom IC-7300 Still Wins!

So, despite my best efforts to date with the DBX equipment pictured below, the stock IC-7300 mic pre-amp and compressor still gets slightly better on air audio reports!

A true testament to how good the Icom IC-7300 sounds out of the box, especially with a Heil Microphone!

I’ve sunk over 30 hours into this setup so far, so my recommendation is to people unless you like fiddling, keep it simple and stick to plugging the microphone into the front!



Diamond X510 (X510MA) Antenna Repair Part 2 (Capacitors)

Last night I got an email from John Isabella, K1IF, stating that he’d read my blog regarding my Diamond X510, and was wondering if I knew what voltage the capacitors inside were rated at.

I confessed that I didn’t, as mine did not seem to be in need of replacing, but with a bit of math we were able to ascertain some suitable ratings, namely 300V rated 2pf capacitors.  If you’re interested in the math, continue reading.

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Alinco DX-SR8T & Icom AH-4 ATU = A Perfect Match!

Just a quick blog today, but I thought I’d talk about my experiences using the Icom AH-4 Antenna Tuner on an Alinco DX-SR8T.  Why would I use an Icom AH-4 on an Alinco?  Because a friend gave me one! 🙂

It is widely known / reported on the web that Alinco’s Tuner, the EDX-2, is made by Icom and is fairly similar (although reportedly cut down) to the AH-4, and can be used with various Icom radios.  As such, I figured it stood to reason that the reverse should be true!

The first barrier, and really, the only barrier, to using the AH-4 with the DX-SR8 is the fact that the Molex Modular connector that comes with the AH-4 is a 4 pin 0.92? Sized connector, whereas the Alinco uses a 5 Pin 0.62″ sized Molex.  Unfortunately, the 5 pin is rather rare, and it cost me $15 to obtain two pairs from the US, but that’s life I suppose.

Luckily, once that hurdle is overcome, it really is quite simple.  If you take the cover off the Icom AH-4 and look at the control line header, the pin outs are printed on the PCB.  It is then simply a matter of wiring up the 5 pin Molex Plug according to the Pinout given in Alinco’s EDX-2 Manual, which I have included below.  Even though the Icom is a 4 pin & the Alinco is a 5 pin, it turns out that both only use 4 wires!  The control protocol is the same / similar enough in this case.

Alinco Pinout

Click on the image above for a larger / ‘eye friendly’ version 🙂