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Author Topic: 813 Rig, a Bit of Progress.....  (Read 14858 times)
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W7SOE
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« on: January 10, 2011, 01:00:18 PM »
I am posting this in the Technical section as it will undoubtedly get technical!

I have created a page to document the progress of the 813 X 813 rig.


http://tinyurl.com/4dmckxp

Rich
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KB5MD
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« Reply #1 on: January 10, 2011, 01:36:56 PM »
All the pics don't load on your web page.  Only the first one.  Changed to "Safari" and it works fine. Thanks
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KC2ZFA
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« Reply #2 on: January 10, 2011, 01:39:59 PM »
website works fine on firefox and osx 10.6.5.

Very nice work ! I would be interested in hearing how the exciter
behaves (and some details on voltages, etc.).

Peter
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W7SOE
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« Reply #3 on: January 10, 2011, 01:54:05 PM »
Peter,
    I am using the lower voltage (about 2200 unloaded) on the HV transformer, at least initially.  The 90800 is getting about 400V and, as I recall, was putting out 10-15 Watts.

Rich

 
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KC2ZFA
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« Reply #4 on: January 10, 2011, 01:59:00 PM »
Quote from: W7SOE on January 10, 2011, 01:54:05 PM
The 90800 is getting about 400V and, as I recall, was putting out 10-15 Watts.

that's neat. Did you have any problems when the osc and PA are at the
sane freq ?
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W7SOE
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« Reply #5 on: January 10, 2011, 02:07:24 PM »
Quote from: KC2ZFA on January 10, 2011, 01:59:00 PM
that's neat. Did you have any problems when the osc and PA are at the
sane freq ?

I am not following...
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KC4VWU
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« Reply #6 on: January 10, 2011, 02:49:00 PM »
I think he's talking about straight through -- no multiplication.
I saw the previous thread on your home brew chassis. Really nice! Have you ever tried the hand grinder fitted with a cutoff blade?
Going to check out your newest pics right now.
 
73, Phil
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ke7trp
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« Reply #7 on: January 10, 2011, 02:51:44 PM »
Dead pics.

C
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KC4VWU
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« Reply #8 on: January 10, 2011, 03:02:48 PM »
They're up, Clark. I just looked at them.

Super neat construction!
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KL7OF
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« Reply #9 on: January 10, 2011, 03:06:09 PM »
Nice Job Rich......Those 813's look new
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ke7trp
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« Reply #10 on: January 10, 2011, 03:07:53 PM »
Red xs on laptop, Computer and phone.  Oh well.

C
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W7SOE
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« Reply #11 on: January 10, 2011, 03:15:06 PM »
Quote from: ke7trp on January 10, 2011, 03:07:53 PM
Red xs on laptop, Computer and phone.  Oh well.

C

Well Dang!   I tried to keep it simple.  I made it using word and uploaded the htm file and the directory containing the associated files to my web host. 

Web experts out there?

Rich

PS  I re-uploaded them in case that helps.....
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W4RFM
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WWW
« Reply #12 on: January 10, 2011, 03:24:53 PM »
It took about 60 seconds, but they all loaded fine for me using xplorer 8.
Very nice work, I hope mine looks that good some future day.
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BOB / W4RFM  \\\\\\\"I have looked far and wide, (I also checked near and narrow)\\\\\\\"
ke7trp
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« Reply #13 on: January 10, 2011, 03:38:44 PM »
Hmm.. I got them up now..  I had to refresh it a bunch of times and they came up. I wonder if they are very large MB Pics?


Anyways.. Looks good!

C
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W7SOE
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« Reply #14 on: January 10, 2011, 04:06:04 PM »
Quote from: ke7trp on January 10, 2011, 03:38:44 PM
Hmm.. I got them up now..  I had to refresh it a bunch of times and they came up. I wonder if they are very large MB Pics?


Anyways.. Looks good!

C

I replaced the images with re-sized ones, I hope I did not break it....


Rich
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KA7WOC
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« Reply #15 on: January 10, 2011, 04:23:15 PM »
Rich,
Wonder if you will be making it to winterfest this year.  It will be Saturday Jan 29 this year in Mineral.  I have some jewels that are part of the pac nw national trust.
ka7woc
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Bob (aka Boatyard)
W7SOE
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« Reply #16 on: January 10, 2011, 04:33:39 PM »
Quote from: KA7WOC on January 10, 2011, 04:23:15 PM
Rich,
Wonder if you will be making it to winterfest this year.  It will be Saturday Jan 29 this year in Mineral.  I have some jewels that are part of the pac nw national trust.
ka7woc

I have run that date by the powers-that-be and it is looking good!  The NW trust?  Like my K7LFE linear that I was instructed, by the person I bought it from, to sell for what I paid?  ;-)

Rich
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W1RKW
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« Reply #17 on: January 10, 2011, 04:47:24 PM »
Works with SeaMonkey.  Nice work!
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Bob
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WA1GFZ
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« Reply #18 on: January 10, 2011, 04:53:25 PM »
looks good
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W7TFO
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IN A TRIODE NO ONE CAN HEAR YOUR SCREEN


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« Reply #19 on: January 10, 2011, 05:00:11 PM »
Kudos! Cheesy

73DG
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Just pacing the Farady cage...
W2XR
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« Reply #20 on: January 10, 2011, 05:05:56 PM »
Hi Rich,

Yes, nice layout and packaging. I think she'll be a beauty when she's all done.

We all look forward to seeing the rig when it is completed.

73,

Bruce
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Real transmitters are homebrewed with a ratchet wrench, and you have to stand up to tune them!

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John-O-Phonic
« Reply #21 on: January 10, 2011, 06:26:18 PM »
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"Let's go kayaking, Tommy!" - Yaz
« Reply #22 on: January 10, 2011, 06:39:05 PM »
I see lots of Teflon wire in there - good going!

This rig is turning out to be one of the best 813's rigs I've seen to date. Very heavy duty metalwork and laid out with good planning.

As they say, if it's worth building, it's worth building right.


BTW, when you get there, don't let the neutralization adjustments throw you.  With all voltages off, put some 7.0 mhz RF into the grid circuit (50 ohms) and attach the scope probe to the tank circuit. Key the amp. Add or subtract sampler plate area (if needed) and move the sampler plate back and forth from the tube until you get a nice range of adjustment with the neut tuning cap as you watch the RF signal on the scope. Then just dip the signal to minimum using the neut  adj cap and you're all set.

Do it on 40M and shud be OK on the other bands. The 813 tetrode is usually very stable in RF service and many guys don't even bother to neutralize them. So the adjustment does not have to be perfect on all bands. But it will be more stable than without neut in the end.

T
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Use an "AM Courtesy Filter" to limit transmit audio bandwidth  +-4.5 KHz, +-6.0 KHz or +-8.0 KHz when needed.  Easily done in DSP.

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Sam KS2AM
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« Reply #23 on: January 10, 2011, 08:29:35 PM »
Loads fast and looks fine on IE9.

Its looking good.
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KM1H
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« Reply #24 on: January 10, 2011, 09:15:19 PM »
Loads fine here also. I like the compactness of the PS, I also hate wasting space.


Just a side comment for others....the 1N5408 diode is only rated at its full 3A with at least 1/2" of lead exposed, with the way some sharply bend the leads right after the body and mount in a PC board seriously derates them. Rich has plenty of lead exposed, especially for that QRP amp Grin

Carl
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