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Author Topic: AWA CHIRPING and BURPING  (Read 7699 times)
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WU2D
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CW is just a narrower version of AM


« on: December 07, 2014, 07:47:59 AM »

The 1929 AWA Bruce Kelly Memorial QSO Party is going on this weekend and next and there are a lot of fun signals being heard. I fired up my 1928 Copy of a two decker called an Aero. It is a Tuned Plate Tuned Grid Oscillator using a Type 210 Tube. Lots of fun. Ia also am running a 40 Meter M>O>P>A> transmitter with a Type 27 in the oscillator and a Type 45 Class C Final on 40M.


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* MOPADial.jpg (2306.93 KB, 2862x1867 - viewed 439 times.)
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WQ9E
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« Reply #1 on: December 07, 2014, 09:07:32 AM »

Very cool rig!  I have an Aero receiver and I am collecting parts to build a suitable period transmitter to match.

I had forgotten about the AWA event and will listen to some of the interesting signals.


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* Coils.JPG (753.98 KB, 1600x1067 - viewed 438 times.)
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Rodger WQ9E
W3GMS
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« Reply #2 on: December 07, 2014, 10:55:06 AM »

The 1929 AWA Bruce Kelly Memorial QSO Party is going on this weekend and next and there are a lot of fun signals being heard. I fired up my 1928 Copy of a two decker called an Aero. It is a Tuned Plate Tuned Grid Oscillator using a Type 210 Tube. Lots of fun. Ia also am running a 40 Meter M>O>P>A> transmitter with a Type 27 in the oscillator and a Type 45 Class C Final on 40M.

To many Holiday things this weekend but hopefully will be able to operate a bit with my TNT  next weekend. 

Wish they would move the event to sometime other than in December which gets very busy.

Joe, GMS
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AJ1G
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« Reply #3 on: December 07, 2014, 05:54:27 PM »

Turned the receivers on a little while ago after wrapping up some late season yard work, heard the cacaphony on 80, what a hoot!  All those signals, each unique, hot zerobeating each other and QSOing.

My vote for the best sounding signal goes to Steve, N8YE's 4W TPTG rig, with B plus supplied by a Ford Model T spark coil.  At first I thought he was running spark!  Gave him a 58KAZOO signal report.  Looking at the RF waveform from the IF output from the R392 on the Tec 535 scope, he had 100 percent positive and negative peaks on his buzz.

No rig that meets the contest rules here, that works, closest thing is the BC-191 MOPA which certainly is close to a 29 design, I may try running it throttled back to 10W next weekend, or try to get my so far unsuccessful 211 Hartley, as per the late Gary Gompf, W7FG's ER article many years back, going.   My original unsuccessful build used a 4 section receiving type variable cap, might have been to lossy for the high RF currents involved.
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Chris, AJ1G
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« Reply #4 on: December 11, 2014, 10:29:50 PM »

Heard WU2D when I was reading the mail looking for a hole. I am not much of a contester but sure do love the old stuff. Got a 45 TNT, An 01A Hartley and just finished a build on a 01A TGTP. It has yet to make a contact however I have been trying around 3550kcs. Also have some 1930s 40s stuff but these are my pre 29 style stuff. They are all in this photo.


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* amcwshack.jpg (178.5 KB, 781x434 - viewed 452 times.)
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Don VE3LYX<br />Eng, DE & petite Francais
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« Reply #5 on: December 15, 2014, 08:18:34 AM »

I had a ball this weekend. I worked both sat and sunday and got to use all three pre 1929 style transmitters. My TGTP 01A with 5.3 watts input, (just built last week) My Hartley also a 01A transmitter with 5 watts input  and finally last evening near closing of the AWA BK I fired up the ol 45 TNT and worked a station in Ohio. I am astounded at the performance of these little rigs. I talked every where I do with my DX60B on AM including when I use it with an amp.  Sometime I think one doesn't get answers because of the old rigs unusual sounds like whoop woop whoop or  a coarse note. That makes some nervous. However they do work and work well. Two of mine are also phone capable so if any feel brave we can do that. There is something fun about using a 80 to 90 year old tube and a mere handful of parts to talk hundreds of miles away.
don
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Don VE3LYX<br />Eng, DE & petite Francais
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Rick & "Roosevelt"


« Reply #6 on: December 16, 2014, 08:38:55 AM »

Don, looks like fun stuff. I particularly like your Barbie diving board on top the HB (?) scope in upper left of group photo.  Grin

Curious if you have all the ARC5 type rigs hooked up for use, or readily available?
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RICK  *W3RSW*
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« Reply #7 on: December 16, 2014, 12:59:19 PM »

Man you have good eyes. That is my RF sniffer lamp which is one of the handier tools I have when homebrewing. The scope I built back in the 80s. Yes the Arcs are both hooked up a ready to roll. Not a lot of power there so they need good propagation. I built a self designed cathode modulator for them that just plugs in the keyhole. I use a carbon mic and a pair of D cells too drive the modulators tube . I used it just a couple of weeks back for a quick QSO. the one on the left is retuned for 80M and the one on the right is retuned for 160M. I have never had a 160M QSO and don't have a 160M antenna but since I use a long wire which is a short wire on 160M (Natural on 80m) and the ARC5s are designed to load a too short single wire I figured I could learnt to make it work.  I also have a twin tube modulator for them that uses a dynamic mic . It modulates a higher % but uses more of the B voltage then I like (needs an extra 180 volts or so added to the B+ to keep both the finals at full voltage and cover the voltage drop across the 6v6 modulating tube. Currently I am using it on my Bare Essentials 80M 50L6 rock bound rig  with a 3736 rock. With the modulator I have on the 80M ARC 5 I am working it a bit hard and am told you can hear that in the signal.
don
BTW the TNT and the Hartley(knob says PA from another project)are also phone capable and some of you here have heard them.
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Don VE3LYX<br />Eng, DE & petite Francais
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« Reply #8 on: December 17, 2014, 04:13:23 PM »

Don, looks like fun stuff. I particularly like your Barbie diving board on top the HB (?) scope in upper left of group photo.  Grin

Curious if you have all the ARC5 type rigs hooked up for use, or readily available?
Was on air this morning with the ARC 5 3705kcs. Using a cathode modulator and a carbon mic. This afternoon I swapped that modulator for one that uses a dynamic mic as they said my carrier was strong but modulation was light although usable.  I see how that goes.
don
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Don VE3LYX<br />Eng, DE & petite Francais
WU2D
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CW is just a narrower version of AM


« Reply #9 on: December 20, 2014, 09:14:28 AM »

I did manage to do up a video for Youtube on the 40 Meter MOPA that has some interesting on-air signals dubbed in.

https://www.youtube.com/watch?v=Ls_Y_USteQQ&list=UUN7RQv_qmzhzuJV1HhJ4OEA


* 40M_FRT.jpg (2508.72 KB, 4565x2484 - viewed 463 times.)

* 27_OSC.jpg (366.69 KB, 2263x1598 - viewed 423 times.)
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W3RSW
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Rick & "Roosevelt"


« Reply #10 on: December 20, 2014, 10:04:26 AM »

Walt, I really enjoyed your YouTube vid. 
Watched it all the way through. You took away a lot of mystery in building a decent 1929 MOPA.  The conversion to a Hartley and the addition of a neut. tap was pretty neat.

I thought the neatest sounding lash-up was the one without much or any filter capacitance on the supply.  That one can be received without a BFO.  Grin

-RST 463 OM.-
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RICK  *W3RSW*
Steve - K4HX
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« Reply #11 on: December 20, 2014, 01:16:25 PM »

Fantastic video and the audio clips made it!

Lots of other good vids on Mike's channel.
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