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The Joy of simple things




 
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Author Topic: The Joy of simple things  (Read 20984 times)
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xe1yzy
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« on: November 02, 2009, 01:04:08 PM »

Hello to all...

This transmitter is a desing from the 50s ARRL Handbook, its a 6AG7 Oscilator, and a 6L6 or 6V6 for final amplifier, I decide to make one in order to show some local ham friends the joy of "glowbugs" and simple things...

the circuit works nice, and have a nice tone in CW, depends on crystals I can reach 15 to 20 watts output, enough power to cross the country!


* 26102009140.jpg (56.5 KB, 512x384 - viewed 528 times.)

* 26102009143.jpg (157.32 KB, 1024x768 - viewed 526 times.)

* 29102009157.jpg (223.04 KB, 1024x768 - viewed 579 times.)
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xe1yzy
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« Reply #1 on: November 02, 2009, 01:08:34 PM »

...some other pics

Rgds

XE1YZY / Pedro


* 29102009152.jpg (145.88 KB, 1024x768 - viewed 597 times.)

* 02112009179.jpg (139.64 KB, 1024x768 - viewed 581 times.)
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Bill, KD0HG
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304-TH - Workin' it


« Reply #2 on: November 02, 2009, 01:26:17 PM »

Well done, Pedro!
I really like simple rigs like that one.

What frequencies are your crystals?
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xe1yzy
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« Reply #3 on: November 02, 2009, 01:34:40 PM »

Hi Bill,

on 40 meters I have the following crystals  7,002 -7,010,- 7,025 -7,040- 7,055,- 7,060,  and 7,087 Mhz

73's
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KL7OF
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« Reply #4 on: November 02, 2009, 02:35:47 PM »

Very nice Pedro...Nice selection of parts...You must have a big junk box   You could make a modulator next time...6l6s??  congratulations! 73 un abrazo mi amigo..Steve KL7OF
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W1RKW
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« Reply #5 on: November 02, 2009, 04:39:14 PM »

I like the old buzzard components underneath the chassis.  Dogbone resistor, that's vintage!
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« Reply #6 on: November 02, 2009, 04:43:45 PM »

I ran the same rig but it didn't look that nice. Graduating to an oscillator / final was a big deal as a novice.
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N0WEK
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« Reply #7 on: November 02, 2009, 05:25:59 PM »

Nice!

I love the pedestal/stand-off mount for the meter!

Greg
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W1UJR
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« Reply #8 on: November 02, 2009, 05:55:04 PM »

Great job!

Simpler is nearly always better.
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xe1yzy
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« Reply #9 on: November 03, 2009, 12:17:58 AM »

Nice!

I love the pedestal/stand-off mount for the meter!

Greg

Hi Greg,

Well it isn't truly a pedestal /stand off, its a towel hanger stilling from my XYL Kitchen, ( she ask me to install it a couple of years a go hi hi)  but looks nice right?

RGDS
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WU2D
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CW is just a narrower version of AM


« Reply #10 on: November 03, 2009, 07:09:42 AM »

I love that lineup! Nice work and we all love the black crackle.

I bult a smaller version up a few years ago- see my avatar - 6AG7 into 6L6 and a Type 80 Rectifier and VR150 regulator. Unbeatable for simplicity and stability.

Mike WU2D


* 6AG7_6L6ClasssicWU2D.jpg (131.29 KB, 1311x948 - viewed 521 times.)
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xe1yzy
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« Reply #11 on: November 03, 2009, 07:25:58 AM »

I love that lineup! Nice work and we all love the black crackle.

I bult a smaller version up a few years ago- see my avatar - 6AG7 into 6L6 and a Type 80 Rectifier and VR150 regulator. Unbeatable for simplicity and stability.

Mike WU2D

Hi Mike,

Nice work!, the adition of the VR150 is a good Idea I also see a diferent final tank coil, but I am agree with you this circuit works really nice, thanks for sharing Mike!

Pedro
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W3GMS
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« Reply #12 on: November 03, 2009, 08:13:00 AM »

Pedro,
Your rig pictures look great.  Its amazing the satisfaction you can get building and operating very simple rigs. 
I enjoy operating my 1929 TNT breadboard transmitter very much.  You can't get much simpler than this!  A single 210 tube with single frequency control.  I attached a few pictures along with the matching power supply I built for it.
Regards,
Joe, W3GMS


* P1010454.JPG (1271.49 KB, 2816x2112 - viewed 577 times.)
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« Reply #13 on: November 03, 2009, 08:19:05 AM »

Here are the rest of the pictures...
Joe, W3GMS 


* P1010452.JPG (1394.92 KB, 2816x2112 - viewed 544 times.)

* P1010453.JPG (1161.47 KB, 2816x2112 - viewed 519 times.)
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W1UJR
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« Reply #14 on: November 03, 2009, 08:41:41 AM »

Buzzardly looking key there GMS, pray tell what is it?
I really like the marble base.

Ok, here are my obligatory old buzzard rigs, but I can't claim building rights, just a caretaker.

Hartley UX-210


1934 TX - From Bill Orr article - I did finish this one, was not working



-Bruce
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W3GMS
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« Reply #15 on: November 03, 2009, 08:49:36 AM »

Looks good Bruce. 
The TNT was built in December 1929 and I became its care taker about 25 years ago.  It runs about 10 watts output and really works well.  I did build the matching power supply for it.  The marble base key is a spark key.  It was given to me by a good friend of mine, Al W3ABN (sk).  He used it and a rotary spark gap back in the spark days.  I have his rotary spark gap as well.  Neat old stuff...
Joe, W3GMS     
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xe1yzy
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« Reply #16 on: November 03, 2009, 12:37:58 PM »

Buzzardly looking key there GMS, pray tell what is it?
I really like the marble base.

Ok, here are my obligatory old buzzard rigs, but I can't claim building rights, just a caretaker.

Hartley UX-210


1934 TX - From Bill Orr article - I did finish this one, was not working


Awesome Bruce, Thanks for share!, I really like those rigs made over a wood base, unfortunatly my junkbos still is not enough!

RGDS!


-Bruce

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xe1yzy
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« Reply #17 on: November 03, 2009, 12:39:51 PM »

Pedro,
Your rig pictures look great.  Its amazing the satisfaction you can get building and operating very simple rigs. 
I enjoy operating my 1929 TNT breadboard transmitter very much.  You can't get much simpler than this!  A single 210 tube with single frequency control.  I attached a few pictures along with the matching power supply I built for it.
Regards,
Joe, W3GMS


Good job Joe, I really like those antique tubes!
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Carl WA1KPD
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« Reply #18 on: November 03, 2009, 04:39:05 PM »

My favorite junk box rig- Point was to use "stuff" that was probably not going to be used elsewhere. 6AG7-6V6 modulated by a 12AX7- 6L6


* Img_2431.Jpg (81.29 KB, 728x556 - viewed 559 times.)
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Carl

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« Reply #19 on: November 04, 2009, 08:00:56 AM »

Chris,
Great looking rig buy using parts that you had around.  That was the way it was years ago and its nice to do that today.  Call it your junk box special---"JBS"!! 

It looks like a JT-30 microphone in the picture.  That was the first Mic I had when I first got into the hobby.  I had never seen one with a chome stand.  Mine had a wooden stand.  Did you change out the stand or did they sell a version with a chome stand? 

Joe, W3GMS     
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WU2D
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CW is just a narrower version of AM


« Reply #20 on: November 05, 2009, 09:15:39 PM »

Perfectly balanced rig Carl! You could do a 6AG7 6L6 modulated by a pair of 6V6's and a 12AX7 too.

I added the plug in coil and driver bandswitching later. Here is the rig with the 80M coil.

Mike WU2D


* 6AG7_6L6_80MCoilWU2D.jpg (163.81 KB, 1565x1217 - viewed 472 times.)
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VE3GZB
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« Reply #21 on: November 05, 2009, 09:35:24 PM »

I, for one, have not lost this joy of simplicity (having to work with complex surface mount electronics all day, turning to vintage technology is a great refreshment to me).

I still have 23 years to retirement but when it comes I'm looking forward to spending more time in my lab, tinkering and building stuff that glows!
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Patrick J. / KD5OEI
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WWW
« Reply #22 on: November 06, 2009, 12:52:51 AM »

Yall have really built some nice rigs there.

The year is coming to an end and maybe it has been done before but how about an "AMFONE simple homebrew TX contest"?

Does this make any sense?

rules:

1.)
* Rigs must be built.
* Can be built from parts, assemblies, kits, parts of kits, household items and junk..
* Any rig old or newly built.
* Tubes, transistors, or hybrid.
* Signal circuits and power circuits must be analog. No IC chips or computer stuff or switching power supplies or digital modulation. That is not a simple TX any more.
*Everyone can vote once in a poll. Maximum votes win. That way it's more like members' choice.

2.)
*see rule #1.
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WU2D
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CW is just a narrower version of AM


« Reply #23 on: November 06, 2009, 06:54:49 AM »

Sounds fun - hit those slop buckets with a 50C5.
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W3RSW
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Rick & "Roosevelt"


« Reply #24 on: November 06, 2009, 10:47:30 AM »

The 50C5 is the most abused, underrated pube in history. Just think of the abuse your typical AF output tube took in zillions of AC/DC sets.
 
Johnson'd still be making CB's if they'd've put a pair modulated by a pair in their 60's sets.

Indestructable..

Ooops, shouldn't have played them up so much.  The AFools will start scarfing them up.

KT88's.  $205 each.
50C5's  (very rare) 325 each.
 Matched quad, only $1350 (if your supplier can round up that many.)
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RICK  *W3RSW*
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