The OEM incandescent lamp in a Daiwa SWR & Power meter which failed is being replaced with modern LEDs.
Five Philips heads screws, 2 on each side and one at the top are removed, and the meter’s top cover is … Read more...
It doesn’t get any simpler than this!
This interface uses the RTS and DTR signal lines from a cheap FTDI USB Serial Adapter, and provides isolated keying for both PTT and a CW key.
Problem!
The FTDI adapter provides … Read more...
Adam fixes his faulty 40M Off Center Fed dipole, after being exposed to the elements for 16 years.
The enclosure was cracked, no doubt caused by the SO-239 being recessed into the sidewall.
A thinner sidewall means the connector will … Read more...
A Yaesu G-800DXA rotator is being used for azimuth satellite tracking being driven from SatPC32 via a K3NG rotator controller interface.
The factory fitted trimpot is only a standard single-turn trimmer, which was awkward to set to a precise value … Read more...
An Icom IC-410PRO UHF transceiver is being interfaced to a Clear-Com intercom system via a TW-47.
I/O required between the IC-410PRO via it’s 8-pin RJ45 connector and the TW-47 are:
• Ground
• PTT
• Mic Ground
• Mic
• … Read more...
My 20 year old Diamond X-500 2/70 antenna stopped working earlier this year.
Not wanting to muck around, I simply ordered a new X-700 from Strictly Ham the following day.
I thought 20 years was a great run for an … Read more...
This simple modification replaces the standard rocker switch with an illuminated type rocker switch that is a drop-in replacement.
One annoying thing about the Weller WTCPT soldering iron is, there is no in-your-face indication it’s on, and it’s easy to … Read more...
Doug, VK4OE, shows us some handy modifications to a 5/16″ combination spanner to make it more user friendly when dealing with SMA connectors in tight spaces.
[jwplayer mediaid=”5720″ image=”https://vk4ghz.com/wordpress/wp-content/uploads/Poster-SMA-Spanner.jpg”]
This article also applies to: Yaesu FT-7800, FT-7900, FT-8100, FT-8800, and FT-8900
Having just recently acquired a pair of Yaesu FT-7800R VHF/UHF Twinband transceivers, a programming cable was now needed.
Only after a few minutes searching, and we find warnings … Read more...
I was recently considering the purchase of one these 2.7 GHz frequency counters, available from Jaycar and other suppliers.
Although 2.7 GHz capability is very appealing, a primary requirement was to have the ability to lock it to the shack … Read more...
These things sure don’t like high SWR, as smoke came out of mine once!
I finally realised I was transmitting on 28MHz into my 50MHz yagi… Ooops!!!
Anyway… R23 crapped itself… big time. Went open circuit.
Refer to PBA overlay … Read more...
The FT-50R will drain it’s battery rather quickly, even if the transceiver is turned “off”.
This mod will reduce the “off” current drain of the transceiver.
Note: Actual layout of PBA may vary depending on revision.
Abbreviated procedure;
This describes how to modify a Yaesu FT-817, so that the +12V appearing on the accessory connector switches on and off with the radio.
Normally, the +12V appears on the ACC connector when it has internal batteries fitted or DC … Read more...
Kuhne provide a PLL Lock status LED on the PLL board of their G3 transverter modules.
This LED is inside the module, which is great when the lids are off on the shack bench, but of limited value when out … Read more...
A look at the Icom CR-293 High Stability Oscillator option in an IC-910.
Easy to tweak, and the stability is very good.
You may not need to muck around with GPS Locking at all.
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