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Friday, March 23, 2018

A New Rig

My new rig...

The Heathkit HW-16 was one of the last rigs designed specifically for the US Novice operator. It was marginally a transceiver. The receiver and transmitter sections share a common power supply and antenna coupling circuitry. The HW-16 covered only 80, 40 and 15 meters, the bands allowed for Novices in the late 60s. The CW only transmitter ran 75 watts and was crystal controlled, again novice requirements. The receiver section was double conversion with 500Hz selectivity. Good selectivity for the chaotic novice bands was a must. After my initial tuning around the 40 meter band I'm pretty happy.

Only 345 +- days to go to the NRR 2019. In the mean time look for me in the evenings around 7110-7120.

Tuesday, March 13, 2018

Novice Rig Roundup Recap

The 2018 Novice Rig Roundup is now history. During the nine day event I used 4 transmitters and 5 receivers to make 23 contacts in 15 states and British Columbia.

This was a great opportunity to try out several of my rigs. Which work best in a variety of situations? Which are easiest to operate? Which are most reliable? Which sound the best on the air? The list goes on....

( Warning: Personal Opinion, YMMV )

Drake 2B and Collins 75A4 with EFJ Adventurer My Adventurer position was set up so that I could easily switch between a Drake 2B and my Collins 75A4. The 75A4 is certainly a fun radio to use. I have a 500Hz crystal filter installed and, with the 75A4 bandpass tuning, I could easily sort signals out. KC frequency readout was great also. The 2B, though, could hold it's own against the 75A4. The only thing I missed on the 2B was KC frequency readout. For pairing with a simple crystal controlled transmitter like the Adventurer the 2B is my choice.

NC-57 with a 6AG7 Sucker Stick Xmtr This pair fits both as an NRR Novice 1 station and as an AWA Linc Cundall pre-1950 rig ( ) I've added a Heathkit QF-1 Q-Multiplier to the NC57 and spread out the bandspread so that 50KC covers most of the dial. It now does a pretty reasonable job on 80 and 40 CW. I just have to ride the RF gain to keep the set from overloading. 4-5 watts out for the 6AG7 transmitter, while expected and a cool design, makes for a tough time raising QSOs. My plan is never to run up the score but QSOs are still more fun that calling CQ CQ CQ. If I were only thinking of the NRR I'd probably replace the 6AG7 transmitter with my Adventurer, but the Adventurer does not qualify for the AWA Linc Cundall. I need a pre-1950 transmitter. Before next year I'll build up some sort of homebrew transmitter using pre-1950 tubes that runs more power than a single 6AG7.

NC-303 / Eico 720 The Eico 720 is my favorite "novice transmitter". I used one 50+ years ago when I was a novice and I like the looks. It has style. Before this year's NRR I replaced the power transformer and did a required tune-up. Now it works without a chirp on all bands. This one is a keeper. The NC303 is a fine late 50s receiver but it has to compete with my Drake 2B as I consider what to use. The 2B is the nicer receiver. Next year my Eico 720 will be paired with my 2B.

Drake R4B with matching T4XB Except for my Novice year I've always had a transceiver at the operating position. With this initial "training" I've just naturally defaulted to transceivers over separate receiver/transmitter pairs for the primary operating position. This year for the NRR I ran my vintage Drake B Line separated. This worked great! I had frequency spotting, QSK keying, code monitor plus matching KC readout on both receiver and transmitter. The R4B receiver with variable/tunable bandpass is a great receiver. This is now my go-to rig when my KX3 won't quite do the job and it fits in fine as an NRR "Novice 2" station.

Saturday, February 24, 2018

2018 Novice Rig Roundup Update

It looks like I'll have three stations available for the 2018 Novice Rog Roundup: Drake 2B / EFJ Adventurer, NC-57 / 6AG7 Sucker Stick Xmtr and NC-303 / Eico 720.

Eico 720s seem to have power transformer problems. I have two, each with a bad power transformer. Lacking a drop in replacement I went to the 'net looking for a replacement.
What I found was a 120V to 480V @ 150VA industrial control transformer. Obviously it didn't have a filament winding but I decided I could live with a separate filament transformer. I changed the '720 rectifier to a silicon bridge rectifier, added a 10 mfd cap to the input of the power supply filter and installed
a "back porch" for the filament transformer. Now under load 530 VDC is delivered to the 6146 instead of the specified 560 VDC...close enough to go on the air at 75 watts input. It tests out just fine. Now I have a couple of minor cosmetic changes before I pair it with my NC-303.

I'm almost ready and really looking forward to this year's NRR.

Thursday, January 18, 2018

2018 Novice Rig Roundup Prep

It's that time of year....the Christmas tree is sitting outside waiting to be hauled away, decorations are boxed up and back in the basement, New Year's Resolutions are in danger of being broken and I'm getting ready for the Novice Rig Roundup.

One of the big pluses for the NRR is that it is a nine day event with the only prizes being for participation. QSOs can go beyond "5NN MN 73" to include real ham-to-ham communications. In addition, the nine day window allows operating times that miss the popular weekend contests and, possibly, hit a day or two of decent propagation. It doesn't hurt that the equipment celebrated by the NRR happens to be some of the same that I dreamed about in 1966 when I was first on the air as a novice.

This year I'm hoping to have several stations up and running.

National NC 303 - Eico 720 I used a '720 as a novice. This one is a no brainer.  It has great looks, outstanding design and some personal history. The Eico 720 is down as the last piece of vintage gear I'll get rid of. I do need to repair mine though. The power transformer rebelled a couple of months ago. I have a replacement that may, with some circuit changes, work . I have a little time. The NC-303 I'm mating with it is a classic of the 50s...built like a battle ship and painted gray to match. It was one of the last true boat anchors to be introduced. How could it not be in my NRR lineup?

Drake 2B - EF Johnson Adventurer This is sort of an odd couple. The 2B represented a new direction for ham radio equipment. It was small and light weight with performance that matched the heavy weights. The Adventurer, on the other hand, was a basic, classic transmitter designed for new novices on a budget. Both have a place it history. They will work well together come March 3.

Collins 75A4 - Central Electronics 20A Here's a pair that did not show up in many Novice stations. It's a mid/late 50s single sideband station. Still, though, it would fit as a family station. The chief op would have single sideband phone capability to match the latest technology while the '20A can be operated crystal controlled CW to meet the needs of the novice / junior operator. The 75A4? What a boon over the basic superhets common among novices. As a novice in 1966 I certainly wouldn't have complained.

Another possibility? I have a simple 1951 novice station built around a 6AG7 sucker stick transmitter and a NC-57 receiver.

See you in the NRR!

Wednesday, January 3, 2018

AWA Bruce Kelley 1929 QSO Party

The 2017 AWA Bruce Kelley 1929 QSO Party wrapped up a few weeks ago and tonight is the 2018 AWA Linc Cundall Memorial CW Contest.

My total for the BK was nine contacts covering both 80 and 40. For me, nine is better than some years and worse than others...sorta of average. It could have been better, though.

The first evening of the BK I had an S8-S9 noise level here. I blamed the poor band conditions of late and soldiered on working only KB0ROB that first night. Sunday afternoon I decided to make certain the noise was really not my problem. With a battery powered receiver on 40 meters I killed all of the power to the house. Surprise, my noise dropped from S8 to S3. Eventually I traced the problem to the wall wart charger for a new Dust Buster. I had time for one more contact that first afternoon. Unfortunately band conditions weren't as good this last weekend but, at least, I know it wasn't my problem.