Category Archives: Uncategorized

Qrp project – filters

Figure 2: The extra harmonic filter is ready for action in this photo. I’d used a kit for the PA output LPF in the TX box, but when I added an additional filter between the Progrock and the BS170 driver, … Continue reading

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Purple Power

Figure 1: The “separates” approach to QRP (click to enlarge). On page one of this blog post, I mentioned that 10 or 20 milli-watts probably wasn’t going to cut it, at least not for regular CW (and not the weak … Continue reading

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A New QRP Setup

Figure 1: My recent purchase (from QRP-Labs.com) is shown along with homebrew TTL/RS232. Click to enlarge I was looking at the kitsandparts “one watter” transceiver, but it’s a “one bander” rig. It looks nice, but I decided that I wanted … Continue reading

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Looking more Deeply at the Alda 103A

Figure 1: Closer look at the Alda 103A transceiver. Click to enlarge. The Alda 103 is a favorite of mine (it’s a tranceiver from the seventies, that covers the 80/40/20 or 80/40/15 meter bands on SSB and CW, and is … Continue reading

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Remote CW with Old Analog Rig

Figure 1: Rough diagram of remote (TX end) for old analog CW rig. Posted 02/11/2017 I have a couple old analog rigs here in the shack, and I thought it’d be nice to remote them to the easy chair in … Continue reading

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The Alda 103 on CW

Figure 1: CW oscillator level control on the Alda 103 (see text). I had been operating the Alda 103 CW/SSB triband ham radio, a gem from the seventies, for a couple weeks on the SSB end of forty meters. I … Continue reading

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The Alda 103A

Figure 1:  An almost forty year old Alda 103A amateur band transceiver. Click to enlarge. The Alda 103 has a very interesting history. It was manufactured (IIRC) in 1977 and 1978, which means it has a nice complement of the … Continue reading

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A Cloud Warmer for Eighty Meters

Figure 1:  The cloud warmer for eighty meters.  Click to enlarge. So, on eighty meters my signals were always in the dust. In the fall season, with thunderstorms hundreds of miles away, I had an S6 static noise level, with … Continue reading

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Shortwave Weather Faxes with the Ten Tec RX320D

Figure 1: RX320D, by Ten Tec, with “homemade” serial gender changer. Click to enlarge So, I’d been trying to obtain weather faxes, of the type transmitted by the shortwave weather transmitters run by the US Coast Guard, and do that … Continue reading

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A Preamp for the SDR

Figure 1:  A preamp tossed together on a piece of proto-board. Click to enlarge. The performance of the Soft66 Lite is alright for the price of a couple fast food dinners, so I’ve no complaints.  But, I thought maybe some … Continue reading

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Using a Pi SBC with Shortwave Radio

Figure 1: The DIP socket in the little SDR board is populated for a BPF. New Orleans Coast Guard weather fax operates at 4.317 MHz, so it is far outside of the default (7 MHz) filter bandwidth of the little … Continue reading

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Another Look at the Vanguard 260

Figure 1: Vanguard 260 PL NOAA weather satellite receiver (click to enlarge). This blog article revisits the Vanguard 260 PL, a weather satellite receiver from the seventies that I found (as a rare bargain) on Ebay.  It covers the 137 … Continue reading

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SoC/SBC Boards for Ham Radio (2)

Figure 1: FLDigi is shown running on the Pi2, decoding a BPSK signal, using Cirrus audio. The Cirrus adapter worked just fine on the Pi2, as can be seen in figure 1.0. I took the audio first from the “phones” … Continue reading

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2.4 GHz Unlicensed Band

Figure 1: Status and printDetail() screen of the pingpair_dyn sample app (click to enlarge). Finally, the unlicensed band nRF24 devices are talking to each other!  It was a bit of a road trip.  One thing to note is the importance … Continue reading

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Ham Radio on a Pi2

Figure 1: Quisk running on the second “homemade” tablet, which use a Pi2 SoC SBC board. (Click to enlarge). Some of the other posts on this site refer to my “homemade” tablet, which I subsequently outfitted with components for ham … Continue reading

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SoC/SBC Boards for Ham Radio

Figure 1: Various combinations that have, thus far been considered for ham radio audio duty (see text for explanation). For the past couple years, I have been attempting to determine what might be the best platform for ham radio and … Continue reading

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Simple SDR + FLDigi

Figure 1: The graphic shows the layout of SDR, as utilized by hams.  Click to enlarge. I decided to utilize the simple SDR hardware by using Quisk as the SDR software, and FLDigi as the digital mode software. It was … Continue reading

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A Second SDR for the Desktop

Figure 1: I liked the “Soft66 Lite” so much I decided I needed another for the desktop, in addition to the one purchased for the homemade tablet. For the desktop unit, a separate enclosure was needed. These tiny little things … Continue reading

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Using Simple SDR hardware

Figure 1: The combination of the “Soft66 Lite“ SDR hardware, the Quisk SDR software, and the WSJTx digital mode software is displayed in the graphic (the WSJTx screen shows two CW signals). The Soft66 Lite SDR hardware worked well with … Continue reading

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A Shortwave Receiver for the “Homemade” Tablet

Figure 1: The “soft66 Lite” SDR (software defined radio) board. It’s a fun thing to build in a spare three hours, and even more fun to operate! Recently I’d integrated a “homemade”  tablet into the station, for things like receiving … Continue reading

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Weather Fax via Shortwave

Figure 1: Received from Boston Coast Guard Transmitter (4 kilowatts) with the fldigi ham software. The received transmission was not very strong, so the resulting facsimile came through with some rough spots, and the bottom half is relatively poor, but … Continue reading

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New (For Me) Omni-A (Analog)

I have always been a Ten Tec fan. As a kid I dreamed about the PM-1, but had to settle for home brew and (eventually) an old (even then) DX-40 transmitter / Lafayette-HA350 RX combo. When I was older, I … Continue reading

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Maritime Mobile and the Weather Fax

Figure 1: The pieces and parts for a QDH weather fax antenna Posted 08/17/2015: My eventual intent to go maritime mobile is connected with amateur radio in more ways than the obvious. Homebrew construction technique is valuable for other things, … Continue reading

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WB8LZR

A younger me, as part of a collage pic made a number of years ago. This is WB8LZR / CW aficionado extreme. This WP blog is dedicated to the author’s amateur radio hobby, and related pursuits.      

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