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The AIRMEC type 871, ZD 00783 OSCILLATOR TEST No1 CT212 | ||
A very nice signal generator picked up at a hamfest for $10. Beautifully made, Larkspur like construction practices and very high biuld quality. The paint color suggests it was made for Naval use, however, the VMARS site reveals that it was purpose biult for servicing Larkspur series equipment. Maybe the paint job determined which Service is was delivered to. Internal components are very similar to things found inside a C42. | ||
but now, thanks to the hard work of the people at VMARS, the complete EMER (thats manual to you! ) is available here at www.vmarsmanuals.co.ok/archive/files_index.htm some
of the key words for documentation, EMER Tels Z341 Z342
Z344 and also T&M F142 . Look for documents numbers
1287,1288,1289 and 1290 which are complete and contain the
schematics.They are a free download, but as they are copyrighted to VMARS I cannot host the files here. |
The
Burroughs B7800
Including
burroughs chip house codes to commercial equivalentsand my part in its maintenance. | |||
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coming up .... a history of the Network at Monash University to be published sometime soon in 2015 |
the talking stones | |
as inspired by the Black Dog |
ferric chloride etching of copper PCBs | A vhf/uhf grid dip oscillator (but there is no grid!) | a PLL based signal generator | The selection criteria of L C R components |
making PCBs in Oz | based on push-pull balanced FET oscillator | dont try this at home! | an old school assignment |
Home made mitre box for precision cutting of metal extrusions, pipe etc etc This gadget was constructed from heavy brass angle stock that I found in a dumpster at work. It had numerous holes in it allready but was otherwise intact. This mitre box permits "precision" cuts to be made in light alloys. My problem with the hacksaw is an in-ability to make good 90 degree cuts which this solves. But more interestingly the use of stops permits reliable precision step and repeat cutting. Very nice if you have to make uniform spacers. This mitre box permits me to make objects only slightly wider than the kerf of the hacksaw blade. The saw guides are spaced to allow the blade free movement. I have found in practice that two guides, front and rear were required to make consistently good true square cuts. The guides are made in such a way as to permit alignment after assembly. Heavy bolts permit alignment. The alignment, when achieved, is then cemeted in place with a purposely drilled hole and small snugly fitting bolt . This ensures that when you drop or otherwise abuse the mitre box the alignment is unconditionally held. This mitre box was designed to be easily held in a bench vice and have ample surfaces for workpiece, clamps and stops | |||
allo allo allo...whats all this then ? coming up, an article about the care and feeding of Lithium Ion cells. Dont try this at home. LIONs can burn and need special care and attention to keep them safe. This will be my lightweight 20AH cell for backpacking and SOTA. So much nicer than a Lead Acid gell cell. | |||
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