w1vtp
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« on: February 24, 2013, 10:18:10 AM » |
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Had a meeting with Wayne WA1SSJ Friday at Mark, KA2QFX's Qth and saw my power supply / modulator for the first time. Here are some pictures.
Al
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W3GMS
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« Reply #1 on: February 24, 2013, 11:07:59 AM » |
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Hi Al, What your not building your own rig??? Your now retired and should have all the time in the world  Joe, GMS |
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Simplicity is the Elegance of Design---W3GMS
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Steve - K4HX
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« Reply #2 on: February 24, 2013, 11:14:45 AM » |
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You'll be world-wide when your get that thing on the air. You were loud the other night on 75 meters, so it should be interesting. Just don't tell anyone about the pink wire. |
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KA0HCP
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« Reply #3 on: February 24, 2013, 11:18:56 AM » |
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Looks spiffy, Al. The shielded terminal strip on the back is smart.
b.
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New callsign KA0HCP, ex-KB4QAA. Relocated to Kansas in April 2019.
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K1JJ
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« Reply #4 on: February 24, 2013, 12:22:29 PM » |
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It's coming along, Al.
Looks like a PDM modulator. Let's see, using a 15 amp meter, is this for a 6 pill RF deck?
Question: The pink coil - looks like the PDM modulator filter - how did you get away with just one coil vs: three? Maybe there are toroidal xfmrs to be added?
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.
Wise Words : "I'm as old as I've ever been... and I'm as young as I'll ever be."
There's nothing like an old dog.
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W2PFY
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« Reply #5 on: February 24, 2013, 12:29:35 PM » |
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What no tubes? there should be at least on 12AX7 in there to give it "warmth" It sure looks nice but I hope the silence that it will not make won't keep you from falling asleep  |
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The secrecy of my job prevents me from knowing what I am doing.
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steve_qix
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Bap!
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« Reply #6 on: February 24, 2013, 02:50:20 PM » |
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It's coming along, Al.
Looks like a PDM modulator. Let's see, using a 15 amp meter, is this for a 6 pill RF deck?
Question: The pink coil - looks like the PDM modulator filter - how did you get away with just one coil vs: three? Maybe there are toroidal xfmrs to be added?
T
8 pills in the rf amp PWM modulator.... DC to 6khz. :-) |
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W4AAB
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« Reply #7 on: February 24, 2013, 04:35:41 PM » |
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That coil ain't pink-it's light red :-). Looking good, Al!! After reading about the tiny sand-state, that is the only way to go solid-state on AM. Now I got another project when I retire.
Joe W4AAB
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KF1Z
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Are FETs supposed to glow like that?
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« Reply #8 on: February 24, 2013, 05:01:16 PM » |
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It's coming along, Al.
Looks like a PDM modulator. Let's see, using a 15 amp meter, is this for a 6 pill RF deck?
Question: The pink coil - looks like the PDM modulator filter - how did you get away with just one coil vs: three? Maybe there are toroidal xfmrs to be added?
T
Most people only use 2 inductors, I have a feeling the second one just hasn't been mounted yet. ( the only one's I've seen or heard of with three inductors, are those that are built for 'extra' power output, instead of just the measly 400watt carrier and 150% + modulation. :-) ) |
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Ralph W3GL
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« Reply #9 on: February 24, 2013, 05:06:24 PM » |
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Looks like there is still work to be done in there, Al... Only one item on that panel is wired. I also note the scratched "TOP" on there. |
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73, Ralph W3GL
"Just because the microphone in front of you amplifies your voice around the world is no reason to think we have any more wisdom than we had when our voices could reach from one end of the bar to the other" Ed Morrow
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steve_qix
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« Reply #10 on: February 24, 2013, 05:45:07 PM » |
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The other inductor is a toroid. Only the input inductor is air wound.
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KF1Z
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Are FETs supposed to glow like that?
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« Reply #11 on: February 24, 2013, 10:19:38 PM » |
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The other inductor is a toroid. Only the input inductor is air wound.
That sounds familiar.  |
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w1vtp
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« Reply #12 on: February 25, 2013, 09:04:24 AM » |
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..I deleted duplicate info. At least you know I didn't fall asleap in my rocking chair A |
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w1vtp
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« Reply #13 on: February 25, 2013, 09:13:01 AM » |
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You'll be world-wide when your get that thing on the air. You were loud the other night on 75 meters, so it should be interesting. Just don't tell anyone about the pink wire. Less than 1/2 an S unit but I'll take what I can get along with the efficiency. I'll just have to give Rosie a heating pad to replace the heat of the 32V1 Full disclosure. Previous math had to be corrected. It's still less than 1/2 an S unit. Here's the Excel file with the corrected math. You can test it out by inputting into the yellow fields. Al |
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W3GMS
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« Reply #14 on: February 25, 2013, 03:25:14 PM » |
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You'll be world-wide when your get that thing on the air. You were loud the other night on 75 meters, so it should be interesting. Just don't tell anyone about the pink wire. Less than 1/2 an S unit but I'll take what I can get along with the efficiency. I'll just have to give Rosie a heating pad to replace the heat of the 32V1 Don't cut the 32V1 short Al. It sounded very good on the AWA net yesterday. Very strong and excellent audio. Joe, GMS |
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Simplicity is the Elegance of Design---W3GMS
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W2PFY
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« Reply #15 on: February 25, 2013, 09:07:30 PM » |
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Don't cut the 32V1 short Al. It sounded very good on the AWA net yesterday. Very strong and excellent audio. Joe, GMS I agree with Joe, as a matter of factor, I thought many times you were on your 5000? Some may scoff at that complement but it sounds that good to me. Now the question, why did you want a class E rig? No 12AX7's etc |
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The secrecy of my job prevents me from knowing what I am doing.
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w1vtp
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« Reply #16 on: February 25, 2013, 09:34:01 PM » |
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Joe / Terry
Point taken. I might have an option. Gotta talk to my contractor friend
Al
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flintstone mop
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« Reply #17 on: February 26, 2013, 06:25:19 AM » |
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There comes a time in one's life that the hassle of gathering parts; then design and build something just isn't there any more.
Right now I wish there was a solid state no-tune linear kit available. They are handy when there are band excursions and following DX. Prolly 600W is ok for starters.
Fred
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Fred KC4MOP
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W3RSW
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Rick & "Roosevelt"
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« Reply #18 on: February 26, 2013, 10:15:33 AM » |
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kPA 500 Elecraft, but alas not class E. But it comes with a very cool toroid power transformer.  |
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RICK *W3RSW*
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Steve - K4HX
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« Reply #19 on: February 26, 2013, 10:39:06 AM » |
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Ameritron makes a few ss amps too. Tokyo Hi-Power makes some very nice ones, with a nice price tag!
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w1vtp
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« Reply #20 on: February 26, 2013, 04:19:14 PM » |
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<snip>
Right now I wish there was a solid state no-tune linear kit available. They are handy when there are band excursions and following DX. Prolly 600W is ok for starters.
Fred
Got $6k? That'll give you close to "legal limit" http://www.tokyohypower.com/hl-2_5kfx.htmlAl |
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Pete, WA2CWA
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CQ CQ CONTEST
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« Reply #21 on: February 26, 2013, 05:01:57 PM » |
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There comes a time in one's life that the hassle of gathering parts; then design and build something just isn't there any more.
Right now I wish there was a solid state no-tune linear kit available. They are handy when there are band excursions and following DX. Prolly 600W is ok for starters.
Fred
Nice amp and a mere bag of shells at $2K for the kit:  |
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Pete, WA2CWA - "A Cluttered Desk is a Sign of Genius"
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W2ZE
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« Reply #22 on: February 26, 2013, 05:20:36 PM » |
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Here's one: http://www.w6kan.com/ssamp.htmlMore science projecty, but its cheap and he spells it out for you. Buy the RF module from Communications concepts as a kit and put it together. |
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steve_qix
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Bap!
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« Reply #23 on: February 26, 2013, 05:59:38 PM » |
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Don't cut the 32V1 short Al. It sounded very good on the AWA net yesterday. Very strong and excellent audio. Joe, GMS I agree with Joe, as a matter of factor, I thought many times you were on your 5000? Some may scoff at that complement but it sounds that good to me. Now the question, why did you want a class E rig? No 12AX7's etc For whatever reason, all other things being equal (microphone, audio processing, etc.), the class E rigs sound better than the Flex radios. No good explanation available - just on the air observations. |
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WA3VJB
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« Reply #24 on: February 26, 2013, 07:12:55 PM » |
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It's the bias.
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