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 91 
 on: May 07, 2024, 07:24:20 PM 
Started by Todd, KA1KAQ - Last post by w9jsw
Yes, it's been that long. In the late 70's, I used to program a storage control unit that talked to a string of 3350 disk drives. They were 350mb each. The control unit had 8M of cache memory. Was the size of a large double door refrigerator! Disk drives were the size of a small file cabinet. 8 in a string. Heavy whip of 230V to power them.

My 813 rig is housed in a Motorola repeater rack. I left it original with the tan paint and rust. Us old guys call it patina. XYL calls it ugly. XYL does not have a vote on shack topics as she rarely visits unless to call out from the top of the stairs that I need to spend time with her...

John

 92 
 on: May 07, 2024, 05:16:49 PM 
Started by W1DAN - Last post by kd1nw
Thanks Dan, You took lots of great pics. I had a great time and the HRO50s will keep me busy for some time

 93 
 on: May 07, 2024, 02:32:40 PM 
Started by W8EJO - Last post by W8EJO
For the Hallicrafters fan:

Hallicrafters HT45 Loundenboomer MKIIA AMP

Uses single 3-400 - included.

Estate item which I have not tested but it looks good.

I believe I have the PS somewhere.
3KV

Not sure of value so best offer.







 94 
 on: May 07, 2024, 11:37:32 AM 
Started by W8EJO - Last post by W8EJO
Gonset Sidewinder  AM/SSB/CW 6 meter transceiver. These are somewhat rare.
Untested estate item.
20 watts PEP, CW & 6 watts AM per manual.

Pick-up or meet suggested due to weight. I can meet at Hamvention May 17-19, at the Greene County Fairgrounds or within reasonable distance of Hamilton, Ohio.

Shipping will be extra.

$100

 95 
 on: May 07, 2024, 11:00:48 AM 
Started by Todd, KA1KAQ - Last post by W3SLK
My gawd! I remember working with the VAX-11 and the PDP-11 code when I first got out of the USN! NASA used it to process wind-tunnel data and send it a CELCO printer. Before I left NASA LRC in 1988, we were just beginning to install the MicroVax's and the Silicon Graphics Iris 2500T and 3030s. Has it been that long? Radwell does a lot of support for classic electronics. We used to send our GE ModBus III trio blocks there for repair.

 96 
 on: May 07, 2024, 10:04:02 AM 
Started by K1JOS - Last post by K1JOS
My KWS-1 generally works well but requires a very high knob setting on Carrier Level (9 /10) to get correct drive for tuning/loading in CW to full output. All resistance/voltage checks closely match the manual.  I have isolated the problem as signal loss to the 6CL6 driver pair grids.  I checked PTO output which is very good.  So, problem is somewhere between the 250kc oscillator and 2nd amplifier (V203).  I tried to follow the signal in CAL emission mode from the osc through each stage with a scope 10x probe (10M/11pF) but it loads down the circuit.  It may be my technique of using tube extenders on two tubes between each stage.  I tried to get under the chassis but the stage compartments in the KWS-1 are just too tight to get a scope probe onto tube pins or the deeply embedded domino mica caps.  Any suggestions for cobbling together a better scope probe to do the job?


 97 
 on: May 07, 2024, 03:17:59 AM 
Started by Todd, KA1KAQ - Last post by Opcom
Years ago, large computers like the VAX 11/780 which no longer worked were stripped of boards for use as replacement parts for ones still in service, and hte cabinets were often converted to wet bars. Just saying, All is never lost, until it is.

pics of one:
http://toyvax.glendale.ca.us/~vance/vaxbar.html

A friend has an old 6 FT tall GE repeater rack cabinet with locking doors.. It is now a place of repose for those long metal things that make loud noises. It's even faked out with a glowing green panel lamp and a red one that randomly comes on a couple times a minute along with some movement of a couple of meters. 4 racks against the shack wall: "One of these things is not like the others.."

 98 
 on: May 06, 2024, 11:57:12 PM 
Started by W7TFO - Last post by W7TFO
https://www.antiqueradios.com/forums/viewtopic.php?t=437817&sid=cbaf96ba019dc90f09d22a7ccd48dd1b

Not me.  Someone needs this, it looks really nice.

73DG

 99 
 on: May 06, 2024, 07:43:44 AM 
Started by wb3eii - Last post by WA2SQQ
This would make an interesting episode of “How it’s Made”

 100 
 on: May 05, 2024, 03:18:35 PM 
Started by wb3eii - Last post by KD1SH
  You might check with these guys:
https://www.ballchain.com
  Made in the U.S, apparently, and the sizes they list are given in standard SAE values, not metric, although they do indicate the metric equivalents.

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