Date: Fri, 28 Jan 94 04:30:32 PST From: Ham-Homebrew Mailing List and Newsgroup Errors-To: Ham-Homebrew-Errors@UCSD.Edu Reply-To: Ham-Homebrew@UCSD.Edu Precedence: Bulk Subject: Ham-Homebrew Digest V94 #12 To: Ham-Homebrew Ham-Homebrew Digest Fri, 28 Jan 94 Volume 94 : Issue 12 Today's Topics: Antenna pre-amp design. Help! EIMAC design book? PROJECT 14: THE WORLD'S SMALLEST TRANSMITTER XTAL source needed (2 msgs) Send Replies or notes for publication to: Send subscription requests to: Problems you can't solve otherwise to brian@ucsd.edu. Archives of past issues of the Ham-Homebrew Digest are available (by FTP only) from UCSD.Edu in directory "mailarchives/ham-homebrew". We trust that readers are intelligent enough to realize that all text herein consists of personal comments and does not represent the official policies or positions of any party. Your mileage may vary. So there. ---------------------------------------------------------------------- Date: 26 Jan 1994 17:14:03 GMT From: mvb.saic.com!unogate!news.service.uci.edu!usc!howland.reston.ans.net!usenet.ins.cwru.edu!lerc.nasa.gov!news.larc.nasa.gov!grissom.larc.nasa.gov!kludge@network.ucsd.edu Subject: Antenna pre-amp design. Help! To: ham-homebrew@ucsd.edu In article <1994Jan26.001852.3038@ke4zv.atl.ga.us> gary@ke4zv.atl.ga.us (Gary Coffman) writes: > >In looking through my collection of ARRL Handbooks, I don't find a >HF preamp until I go back to the 1962 edition. They have one using >a 6AK5 pentode. This should give you an idea of the apparent lack >of need for such circuits with more modern equipment. Actually, I recommend this circuit... I built it when I was a kid and hung it on the front of a modified Philco table radio and it worked very nicely to the point where the rotten selectivity of the radio was a problem. The manufacturer probably never expected anyone to tear windings off the AM loopstick to move it to 80M. --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." ------------------------------ Date: 28 Jan 1994 02:18:31 GMT From: usc!howland.reston.ans.net!usenet.ins.cwru.edu!cleveland.Freenet.Edu!al838@network.ucsd.edu Subject: EIMAC design book? To: ham-homebrew@ucsd.edu The book you may be looking for is called "Care and feeding of POWER GRID TUBES" by Varian EIMAC. The copyright is 1967 and I have a copy of the fourth printing which was in 1982. The Library of Congress number is 67-30070. The book has about 160 pages and covers just about everything a designer needs to know about power tubes. The price printed on the cover is $5.95 in the US. I got my copy for free from Varian EIMAC Division, 301 Industrial Way, San Carlos, CA 94070. I have no idea if it is still in print or available but I hope this lead helps. 73, Eric -- Eric Grabowski, WA8HEB al838@cleveland.freenet.edu Chagrin Falls, Ohio ------------------------------ Date: 26 Jan 94 22:07:27 GMT From: ucsnews!sol.ctr.columbia.edu!howland.reston.ans.net!vixen.cso.uiuc.edu!moe.ksu.ksu.edu!cis.ksu.edu!mac@network.ucsd.edu Subject: PROJECT 14: THE WORLD'S SMALLEST TRANSMITTER To: ham-homebrew@ucsd.edu > If there was a contest to come up with a xmtr containing as few >parts as possible, this would be the winner: 10 parts if you include >the key, battery, and antenna! Several years ago I saved a similar (but different) 9-part (counting a 2-winding tapped inductor as one part!) xmtr from either 73 or Ham Radio magazine. The design was "Thanks to WB6OMV" and supposedly (I've NOT built one) ran about TWO WATTS output: fund. Antenna +------xtal-----------+------------+ | | | | | | 365pf ) | | | ) +----+ | +----)------------) | | | | ) ( | 2N3053 | / c | ) ( +-------------|/ | ) ( | b|\ | | | | \ e +-----+------+ +----+ 10Kohm | | | | | | | | | | | | 22ohm | | |+ | | | | 0.02uf battery | | key | | |- | | | | | | | | +----^-----+------+-------+ | | | +---------------------+ ground --Myron. -- # We preserve our freedoms using four boxes: soap, ballot, jury, and cartridge. # Myron A. Calhoun, PhD EE; Assoc. Professor (913) 539-4448 home # INTERNET: mac@cis.ksu.edu 532-6350 work, 532-7353 fax # UUCP: ...rutgers!depot!mac Packet radio: W0PBV@N0ARY.#NOCAL.CA.USA.NA -- # We preserve our freedoms using four boxes: soap, ballot, jury, and cartridge. # Myron A. Calhoun, PhD EE; Assoc. Professor (913) 539-4448 home # INTERNET: mac@cis.ksu.edu 532-6350 work, 532-7353 fax # UUCP: ...rutgers!depot!mac Packet radio: W0PBV@N0ARY.#NOCAL.CA.USA.NA ------------------------------ Date: Wed, 26 Jan 1994 18:49:32 GMT From: news.cerf.net!pagesat.net!olivea!news.bbn.com!petra!zds-oem!news@network.ucsd.edu (Earl Morse) Subject: XTAL source needed To: ham-homebrew@ucsd.edu In article patrick_tatro@stortek.com (Patrick Tatro) writes: >Im looking for a vendor willing to supply crystals in the 1 or 2 quantity >basis. Most vendors have minimum quantities that far exceed my needs. I am >also not sure if I can locate crystals at 16.660Mhz and 16.600Mhz. Im trying >to convert an FM pocket tranciever into a cordless phone unit. Any help will >be greatly appreciated. Try Bomar Crystals 201 Blackford Avenue Middlesex, NJ 08846- 2598 908-356-7787 They sell onesies and twosies. Usually $10.00 a pop. Earl Morse KZ8E e.morse@zds.com ------------------------------ Date: 26 Jan 1994 22:08:07 GMT From: ucsnews!sol.ctr.columbia.edu!howland.reston.ans.net!usenet.ins.cwru.edu!slc6!trier@network.ucsd.edu Subject: XTAL source needed To: ham-homebrew@ucsd.edu Mike Stansberry (jms@col.hp.com) wrote: : I order my crystals from either International Crystal Mfg. (ICM), : 1-800-426-9825, or Jan Crystals, 1-800-526-9825 (just noticed the : similarity between those numbers, ... In article , Alan Bloom wrote: >9825 = "XTAL" It can go a step farther. 426 = "ICM" and 526 = "JAN", so the numbers spell out 1-800-JAN-XTAL and 1-800-ICM-XTAL. I wonder if the companies realized the similarity of their mnemonics when they chose them? Stephen -- Stephen Trier KB8PWA Dave: [H]as anyone ever met a Zamboni driver? Other: trier@ins.cwru.edu Mike: The next version of OS/2 will include a Home: sct@po.cwru.edu Zamboni driver. Let's see Microsoft top that! (dave@cs.arizona.edu & miked@vnet.ibm.com) ------------------------------ End of Ham-Homebrew Digest V94 #12 ****************************** ******************************