Hello, I serviced many of these back in the day... the 1010 is a slightly later version of the 1000, both are good units, and will retune into the ham band with little or no modification needed. The crystals are very 'finicky', do not try to replace them yourself, only International Crystal can successfully do them, you must return the ICOMS for the 1010 to them. the 1000 uses crystals without the icom as standard, but with a separate icom-like oscillator on a flip up chassis in the exciter unit on optional stability models.. The Wacom duplexer is a far superior unit to the DB one. The PA requires about 7 to 15 watts to drive to full power... ba careful however, it is possible to get over 130 watts out from the amp. ... great for a very short time. Adjust the power set for 95 watts, no more, and it should run forever. Schematic-wise, the TX and RX are basically mobiles, Fleetcom 559 as I recall. The 1000 receiver should have an gold colored metal shield kit around the chassis, an optional, but very much needed item for good performance. The later 1010 units are built as slide out brown colored drawer units, complete with an integral controller unit, programmable from a touch tone key set on the front, it sets PL, cor, etc. lance N2HBA
----- Original Message ----- From: D. To: Repeater-Builder@yahoogroups.com Sent: Sunday, December 14, 2008 7:42 PM Subject: [Repeater-Builder] E.F. Johnson Repeaters Hello to the group. i am in need of some information on E.F. Johnson Repeaters. I am looking for any data about retuning them back into the UHF ham band. I have two different machines with different product numbers on the exciter / receiver / PA Both machines have a controller, Channel Guard (PL Tones) First Machine: Model number of 023-1010-531 on the receiver, and M# 023-1010-120 on the exciter, and a M# of 023-1010-200 on the PA. With Waycom Duplexers 464.825/469.825 Second Machine: Model # 023-3823 on RX, M# 242-1000-001 on TX, Decible Products Duplexer 461.175/466.175 the PA is a TPL Communications RXR series. I also have a third PA without any markings on it other than this A033A053A 21532 I would like to have anything that would pertain to modifying there to the UHF Ham Band. Manuals on the original configuration from E.F. Johnson, to details from someone who has made this mod. I will furnish Photos if this would help. Thanks, Danny N5DRG ------------------------------------------------------------------------------ No virus found in this incoming message. Checked by AVG - http://www.avg.com Version: 8.0.176 / Virus Database: 270.9.18/1848 - Release Date: 12/14/2008 12:28 PM
