[Boatanchors] General Electronics TN-75 transmitter
My first novice rig was a General Electronics TN-75 transmitter and a HQ-129X receiver. The TN-75 had a 6CL6 crystal oscillator and a 807 final, with a 5U4 rectifier. It only had two bands, 80 and 40 meters, but I only had a 40 meter plug in coil. It would be nice to have one again even though I had very few contacts on it before the transformer smoked. Anyone out there have one that they are willing to part with? Later I got an early model HT-4 but used it for parts to build a linear amplifier. I wish I still had that one but they are hard to come by and would be very costly. 73 Bill wa4lav ___ Boatanchors mailing list Boatanchors@puck.nether.net https://puck.nether.net/mailman/listinfo/boatanchors
Re: [Boatanchors] Kleinschmidt teletype
It was a wirewrapped 6502 with rewritten Kim monitor in 4 1702 256x8 eproms. The output routine was sent baudot code. With things like .EQ. for = and .LE. for< etc. Input however was a ASCII keyboard from Jameco. You could get them for around $10. Later I made a tape interface so that I could load tiny basic. I first had only 1k bytes of ram ( 8x 2102) but finally got up to 32 k with 8 4k boards all on 22 pin double readout PCB's hand etched by a friend here in town. Took a lot of power. I still have it in the basement somewhere. A flood ruined my model 15 and my speedgraphic camera. along with a lot of other stuff. Was not exactly a flood, we had a ice storm and loss of power for about a week and the basement filled up with water since the sump pump did not work. My second computer was a Rockwell AIM-65 that I put into an old IBM took kit. MY first lap top. It had a little thermal printer and a LED alph numeric display. I got a 32kB memory board that was intended for, I think, OSI computers. That board cost $600 those days. This was around 1979. I still used my model 15 sometimes for printouts but replaced it with a surplus chain printer, about 250 lb monster. I knew the company I was working for was going bust so I also added A/D and D/A to it with the intent of going into consulting. However, an engineering position opened up at the University of Kentucky in the Physics department. I applied and took my computer in the attache case. It impressed them, but they showed me their fast Z80 s-100 computers and I challenged one professor to a race. We both had Microsoft basic and entered the same program, something like 1 multiplies, I won. I got the job too. Sorry to be so long winded, but you did ask. 73 Bill wa4lav From: couryho...@aol.com [couryho...@aol.com] Sent: Wednesday, September 30, 2015 3:00 AM To: Fuqua, Bill L; damonregis...@bellsouth.net; Boatanchors@puck.nether.net Subject: Re: [Boatanchors] Kleinschmidt teletype Bill! tell us more about the computer and how you used the 15 with it... as a printer? or also as a keyboard input device. Thanks Ed Sharpe Archivist for SMECC In a message dated 9/29/2015 8:12:15 P.M. US Mountain Standard Time, wlfuq...@uky.edu writes: That reminds me, some day I need to find a model 15 TTY so that I can get my first computer up and going again. It is down stairs and perhaps may still work if the old eproms are still good. All wire wrapped. 73 Bill wa4lav ___ Boatanchors mailing list Boatanchors@puck.nether.net https://puck.nether.net/mailman/listinfo/boatanchors
Re: [Boatanchors] Neat Source of Modified Crystals
You have to understand that HC49S crystals can't handle the power that FT-243 crystals can. They are more fragile than the larger ones. Be careful when using them in vacuum tube applications. Heating may not fracture them but may cause chirp and drift. 73 Bill wa4lav From: Boatanchors [boatanchors-boun...@puck.nether.net] on behalf of q...@kd4e.com [q...@kd4e.com] Sent: Tuesday, August 11, 2015 11:03 PM To: BOATANCHORS; Florida boatanchors Subject: [Boatanchors] Neat Source of Modified Crystals Not sure if these will work in any rigs other than those listed - but worth inquiring ... considering the price! http://kc9on.com/hc-49s-crystals/ -- *David* KD4E ARES-EC Bulloch County, Nevils, Georgia USA Safe Secure Search Engine: duckduckgo.com Android for Hams: groups.yahoo.com/group/hamdroid Creative Tech: groups.yahoo.com/group/ham-macguyver Raspi Alternative: groups.yahoo.com/group/beagleboneblack/ Restored to design-spec at Heaven's gate 1Cor15:22 ___ Boatanchors mailing list Boatanchors@puck.nether.net https://puck.nether.net/mailman/listinfo/boatanchors ___ Boatanchors mailing list Boatanchors@puck.nether.net https://puck.nether.net/mailman/listinfo/boatanchors
Re: [Boatanchors] [ARC5] Unusual BC-221
Now, I have a question. There is an experiment I always wanted to try if I ever found a still boxed Bc221 or LM. Is it still accurate? Can you check it WWV perhaps or a well calibrated crystal calibrator to see if it still agrees with the book? First, how close is the crystal calibrator before making any adjustments to it, and then after setting the crystal calibrator how closely does the book match. I had always been amazed by the precision of many instruments made during WWII. 73 Bill wa4lav From: ARC5 [arc5-boun...@mailman.qth.net] on behalf of Dave Hollander [n...@cox.net] Sent: Tuesday, March 03, 2015 7:30 PM To: milsurp...@mailman.qth.net; BOATANCHORS; Boatanchors@puck.nether.net; Old Tube Radios; a...@mailman.qth.net Subject: [ARC5] Unusual BC-221 This unusual BC-221 followed me home from a hamfest a few years ago. The guy practically begged me to take it. I just got it out of storage a few days ago. I have never seen one like this and don't find any model numbers on it. I did have it on the bench and it works. Attached are some pictures. http://n7rk.com/radiostuff9/bc221unusual.jpg http://n7rk.com/radiostuff9/bc221unusual2.jpg http://n7rk.com/radiostuff9/bc221unusual3.jpg http://n7rk.com/radiostuff9/bc221unusual4.jpg http://n7rk.com/radiostuff9/bc221unusual6.jpg http://n7rk.com/radiostuff9/bc221unusual7.jpg Anyone seen one like this? Comments? Tnx and 73, Dave N7RK -- *** Dave N7RK Boatanchors Home Page: http://n7rk.com Phoenix, Arizona *DXCC Honor Roll**WAZ#22 - 75 Meter SSB* ex-XE2/N7RK, N7RK/ZB2, VK2ERK, ZM0AJN, WB6NRK, WN6IWX Boatanchor and Antique Radio Collector __ ARC5 mailing list Home: http://mailman.qth.net/mailman/listinfo/arc5 Help: http://mailman.qth.net/mmfaq.htm Post: mailto:a...@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html ___ Boatanchors mailing list Boatanchors@puck.nether.net https://puck.nether.net/mailman/listinfo/boatanchors
Re: [Boatanchors] Preselector Elmac PMR-6a?
If you can hear additional background noise when you connect the antenna, then probably no unless you have a problem with image rejection. 73 Bill wa4lav From: Boatanchors [boatanchors-boun...@puck.nether.net] on behalf of q...@kd4e.com [q...@kd4e.com] Sent: Monday, June 09, 2014 1:00 PM To: BoatAnchors Subject: [Boatanchors] Preselector Elmac PMR-6a? Would a preselector make enough of a difference used with an Elmac PMR-6a to be bothered with? Added selectivity and low-noise sensitivity would be the intended goal - used in a fixed rather than original-design mobile setting. Thanks - David KD4E -- David Colburn, KD4E - Nevils, Georgia USA Safe Secure Search Engine: duckduckgo.com Android for Hams: groups.yahoo.com/group/hamdroid Creative Tech: groups.yahoo.com/group/ham-macguyver Raspi Alternative: groups.yahoo.com/group/beagleboneblack/ Restored to design-spec at Heaven's gate 1Cor15:22 ___ Boatanchors mailing list Boatanchors@puck.nether.net https://puck.nether.net/mailman/listinfo/boatanchors ___ Boatanchors mailing list Boatanchors@puck.nether.net https://puck.nether.net/mailman/listinfo/boatanchors
Re: [Boatanchors] A little known single tube (twin triode) transceiver from WW2 Japan.
I will gladly take mine to Dayton if anyone might be serious about it. Can't mail it. It would set off too many alarms. 73 Bill wa4lav From: Fuqua, Bill L Sent: Monday, February 10, 2014 10:33 PM To: q...@kd4e.com; BoatAnchors Cc: Ham MacGuyver Subject: RE: [Boatanchors] A little known single tube (twin triode) transceiver from WW2 Japan. I have one with leather case , schematic cards etc. don't have accessories. It does have a very nice built in key for CW and a thin leather patch on the leather case for CW just over the button. However, if you have a Geiger counter within 10 yards it will go crazy. 73 Bill wa4lav From: Boatanchors [boatanchors-boun...@puck.nether.net] on behalf of q...@kd4e.com [q...@kd4e.com] Sent: Monday, February 10, 2014 6:13 PM To: BoatAnchors Cc: Ham MacGuyver Subject: [Boatanchors] A little known single tube (twin triode) transceiver from WW2 Japan. Fascinating ... Original Message Subject: A little known single tube (twin triode) transceiver from WW2 Japan. Date: 10 Feb 2014 13:21:55 -0800 From: mister3...@yahoo.co.uk Imagine a transceiver, with one valve, doing speech and CW. One valve, a double triode with clever switching:- Here is the history:- http://www.cryptomuseum.com/spy/94-6/index.htm http://www.armyradio.com/arsc/customer/pages.php?pageurl=/publish/Articles/William_Howard_Japan/JapaneseType94-6Radios.htm Here is the techy info:- http://mikeyancey.com/73mag/listauthor.php?Author=PA0SE Stephen G7VFY -- David (NOT Dave) Colburn, KD4E - Nevils, Georgia USA Safe Secure Search Engine: duckduckgo.com Android for Hams: groups.yahoo.com/group/hamdroid Creative Tech: groups.yahoo.com/group/ham-macguyver Raspi Alternative: groups.yahoo.com/group/beagleboneblack/ Restored to design-spec at Heaven's gate 1Cor15:22 ___ Boatanchors mailing list Boatanchors@puck.nether.net https://puck.nether.net/mailman/listinfo/boatanchors ___ Boatanchors mailing list Boatanchors@puck.nether.net https://puck.nether.net/mailman/listinfo/boatanchors
