lets dust this thing off!

[Jason W6IEE]

Hi, to anybody who is still subscribed! 

Project time: (Its getting to be "shack season" again!!) I figure its time to end the "paralysis by analysis" and I'm going to build VK3YE's neat little minimalist 40m DSB transmitter as can be seen here:

http://www.youtube.com/watch?v=siSgeljr4HE

Unfortunately it uses an electret, not a carbon mic. ;) I'm sure that could be changed though.

Since ceramic resonators for a good 40m frequency don't seem to be plentiful, I ordered some 7.200 crystals from N4ESS on ebay. (~$2.55 each, at about the same for shipping)

So, I propose 7200 as the center of activity. The past couple days I've thrown out a few CQ's at 50 watts and haven't yet pulled anything in, so doing the same with a watt or two might be interesting.

As far as other variations on VK3YE's circuit, unless I decide I need to place an order to partsandkits.com pretty soon, I'll be building it with 2n3053's instead of BD139's, which will likely yield less power out. 

At the far back of my mind in conjunction with this project, is W6JL's 50 watt FET linear amplifier that was featured in QST in 6/2010.

When I have progress to report, I'll slap it on my blog page and post a notice here.

73,

Jason W6IEE

--
w6iee.blogspot.com
AMI, SKCC, QRP ARCI, GQRP, CVRC, SBMS, Cactus.
http://en.wikipedia.org/wiki/Junk_box
http://www.flickr.com/photos/kf6pqt/

[ke...@charter.net]

Sounds like a great project If possible please keep us up to date on this : ) 73 Bill  KE9XQ

On Thu, Nov 15, 2012 at 10:26 AM, Jason W6IEE wrote:

 Hi, to anybody who is still subscribed! 

Project time: (Its getting to be "shack season" again!!) I figure its time to end the "paralysis by analysis" and I'm going to build VK3YE's neat little minimalist 40m DSB transmitter as can be seen here:

http://www.youtube.com/watch?v=siSgeljr4HE

Unfortunately it uses an electret, not a carbon mic. ;) I'm sure that could be changed though.

Since ceramic resonators for a good 40m frequency don't seem to be plentiful, I ordered some 7.200 crystals from N4ESS on ebay. (~$2.55 each, at about the same for shipping)

So, I propose 7200 as the center of activity. The past couple days I've thrown out a few CQ's at 50 watts and haven't yet pulled anything in, so doing the same with a watt or two might be interesting.

As far as other variations on VK3YE's circuit, unless I decide I need to place an order to partsandkits.compretty soon, I'll be building it with 2n3053's instead of BD139's, which will likely yield less power out. 

At the far back of my mind in conjunction with this project, is W6JL's 50 watt FET linear amplifier that was featured in QST in 6/2010.

When I have progress to report, I'll slap it on my blog page and post a notice here.

73,

Jason W6IEE

--

w6iee.blogspot.com

AMI, SKCC, QRP ARCI, GQRP, CVRC, SBMS, Cactus.

http://en.wikipedia.org/wiki/Junk_box

http://www.flickr.com/photos/kf6pqt/

--

Carbon Mics Forever!! ;)

The "Homebrew Dual Sideband" group.

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[W5COV]

What did you use to generate the 50 watts ?? Looks like my kind of rig . I am an old analog guy . If my project schedule wasn't so
full already I would take an evening and put one together . Maybe one of these evenings I will need a break from a particularly
difficult problem and toss one together ....

THANKS for sharing !!

Charlie , W5COV

[Steve Smith]

OK. I re-drew the diagrams shown in Pete's video. So what happens when I simply attach a file to an email? Will Google liquidate me?

If you hear nothing further from me, you'll know what happened.

73.......Steve Smith WB6TNL
"Snort Rosin"

[Steve Smith]

OK, that worked and there was no big puff of smoke so here are the other files.

73.......Steve "Carbon Mic's. for never" Smith WB6TNL

---------- Original Message ----------
From: "Steve Smith" <sig...@juno.com>
To: homebrew-du...@googlegroups.com
Subject: Re: [homebrew-dual-sideband:161] lets dust this thing off!
Date: Thu, 15 Nov 2012 21:40:54 GMT

Will Google liquidate me?

[Michael Tauson]

From: homebrew-du...@googlegroups.com [mailto:homebrew-du...@googlegroups.com] Hi, to anybody who is still subscribed! 

 

I still be proscribed in this here place. 

 

Unfortunately it uses an electret, not a carbon mic. ;) I'm sure that could be changed though.

 

Okay, what’s wrong with an electret, aside from not having any on hand?  Yeah, yeah, I know about the freq limiting with carbon mics but good audio stage design can take care of that.  Besides, I don’t have any of them either.  :-)

 

Since ceramic resonators for a good 40m frequency don't seem to be plentiful, I ordered some 7.200 crystals from N4ESS on eBay. (~$2.55 each, at about the same for shipping)

 

What ID is he selling under ‘cuz his calls don’t bring up anything.

 

As far as other variations on VK3YE's circuit, unless I decide I need to place an order to partsandkits.com pretty soon, I'll be building it with 2n3053's instead of BD139's, which will likely yield less power out. 

 

I checked my tube manuals and couldn’t find either of the above.  They don’t even fit Cunningham’s occasionally oddball numbers.  Are they some weird European kind that don’t cross to good old American products?

 

At the far back of my mind in conjunction with this project, is W6JL's 50 watt FET linear amplifier that was featured in QST in 6/2010.

 

Heck, an 811 can do that all by its lonesome.  It don’t need no fancy-dancy stuff to gum up the works. 

 

Seriously (Yes, I can do that too.  Surprise!), there are several ways to create a DSB signal.  Off the top of my pointy little head, I can think of a sideband generator for a filter type rig either without the filters or with both in play and the super easy way of running a push-push amp with the audio fed push-pull to the screens.  I like the latter for a number of reasons, none the least of which being that I can do the DSB generation at low level than put a linear behind it.  I like doing AM the same way and for much the same reason; the iron needed for low level is more affordable.  Since I’m cheap … er, on a very tight budget, this works nicely.

 

There is a SB-175 on the inbound that needs some TLC but is a commercial AM/CW/DSB rig from before time.  (Hawaiian pidgin for “Way back when.”)  The way it switches between AM and DSB is interesting; it switches the PA between push-push and push-pull.  Kinda makes me wonder if a homebrew DSB rig couldn’t be made the same way using something on the order of 6AQ5s (more accurately, 2E30s) in the PA.  Considering they’d be screen modulated, I’m not entirely sure what I’d use there except maybe another 6AQ5 running easy. 

 

OTOH, this may be yet another new and unique use for some RTL914s if I can ever come up with some.  RTL ICs that were linearized and good to 450 MC can’t be all bad, right?

 

Best regards,

 

Michael, WH7HG, A&P 1803851 Ph: 1-866-733-0218

I live with a maniac at home, my other me.

http://www.nationalmssociety.org/chapters/NTH/index.aspx

http://wh7hg.blogspot.com/

http://kludges-other-blog.blogspot.com

Hiki Nô!

[Jason W6IEE]

Thanks! I will give them a look-over once the coffee kicks in. -Jason

--
Carbon Mics Forever!! ;)
The "Homebrew Dual Sideband" group.
homebrew-du...@googlegroups.com
*To unsubscribe from this group, send email to
homebrew-dual-sid...@googlegroups.com
For more options, visit this group at
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Please consider joining the Glowbugs Group!
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[Jason W6IEE]

Hi Michael,

The ebay ID is the call sign, here's the direct link:

http://myworld.ebay.com/n4ess?_trksid=p2047675.l2559

I think there's a time for tubes gear, and a time for transistor gear. Portable, super-small, easy to power, and "gee whiz" vs. retro cool! The tiny, the gee whiz, and the super-simple got me on this one. Tube projects seem to lead me to more procrastination lately, whereas this one is going to satisfy the near-instant gratification gremlin. ;)

73,

Jason

--

Carbon Mics Forever!! ;)
The "Homebrew Dual Sideband" group.
homebrew-du...@googlegroups.com
*To unsubscribe from this group, send email to
homebrew-dual-sid...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/homebrew-dual-sideband?hl=en
Please consider joining the Glowbugs Group!
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[Michael Tauson]

From: homebrew-du...@googlegroups.com [mailto:homebrew-du...@googlegroups.com] On Behalf Of Jason W6IEE
The eBay ID is the call sign, here's the direct link:

http://myworld.ebay.com/n4ess?_trksid=p2047675.l2559

 

I found it this time.  Thanks.  Seems eBay is case sensitive about some things. :-)

 

I think there's a time for tubes gear, and a time for transistor gear. Portable, super-small, easy to power, and "gee whiz" vs. retro cool! The tiny, the gee whiz, and the super-simple got me on this one. Tube projects seem to lead me to more procrastination lately, whereas this one is going to satisfy the near-instant gratification gremlin. ;)

 

Don’t tell anyone on glowbugs or boatanchors that I also like putting ICs into designs since I’ll deny doing so without hesitation.  Already mentioned are my favorite digitals to use directly or after being linearized some but also things like NE-612s, 1496s and the like can be quite handy.  One of the reasons I’m paying close attention to the fine control of the Waldos is to be able to get back to doing these things.  (Hollow state doesn’t require as fine control.)  Dead bug and freeform construction like the JBOT amplifier are familiar from my microbot days when the components were incorporated in the chasses to simplify them even more.  (Nothing like building a motor driver by super gluing the parts to the motor and using SMD when possible.)  The idea then was to minimize as much as possible while still having the bot work as planned.  They were sort of but not quite BEAM bots if anyone’s familiar with them and were a total blast to build.

 

Anyway, the disparity between using solid state and my love of 1930s tech is easily recognized but no one said anyone had to be consistent in this hobby.  Even better, doing a little creative anachronistic design can be amusing as well – solid state VFO with the favored 6AQ5s & 2E30s (RF version of the 6AQ5) in between and a 1930s PA.  

 

Also, add in submini tubes and mini battery set tubes.  These are fabutastic for creating low power demand receivers as well as transmitters up to the PAs with a 2E30 or two going there.   

 

Just some thoughts scribbled on a rusty nail … or was it with a rusty nail … ???

[Ian Wilson]

I have a few 4E27A's and this looks like a neat project to put
in front of one of them. Questions:

  - what frequenc{y,ies} have the group settled on?
  - getting any QSOs using this mode?
  - will my flight home from San Jose leave on time (or at all)?

73, ian K3IMW

[Steve Smith]

Well, I believe the consensus is 7200 KHz down since that is the frequency of the available ceramic resonators and cheap crystals.

I'm going off the reservation and building a VFO with a polyvaricon, if I can keep it stable enough. I'm discovering that all polyvaricons are not created equal. If that fails then temporarily I will use Genuine FT-243s just to get off the ground.

Charlie Queen Delta Xylophone.

73.......Steve Smith WB6TNL