Search found 8 matches

by Ghostwriter
Fri Feb 24, 2006 11:32 pm
Forum: Vertex
Topic: NYPD using Vertex?
Replies: 8
Views: 6637

NYCPD using P25 Digital .... NOT!

Alex is correct with NYCPD using the newer Digital mode of P25 ... the high level NYCPD personnel informed the U.S. Government FCC Officials to take a Flying Leap on the new technology 5~6 years ago. They're still implementing new /\/\ Analog (Highly SP'd) Spectra-Tac Comparators that were manufactu...
by Ghostwriter
Thu Feb 02, 2006 11:15 pm
Forum: Yaesu
Topic: FT-840 FM Mode
Replies: 1
Views: 4734

Yaesu FT-840 Tranceiver FM Operation

I just went to the Amateur Electronics Supply webpage: http://www.aesham.com/ I did a search for the FM-747 FM Module for the FT-840 transceiver and it's still available for $70.00 New. This is what you need for the transceiver to operate on the NBFM (30 KHz) channels above the 29 MHz portion of the...
by Ghostwriter
Mon Oct 10, 2005 1:45 pm
Forum: General Chatter
Topic: Thales wideband portable
Replies: 14
Views: 6412

Hello Pj , Hey that's a nice looking Handheld Portable 2 Way Radio Model PRC-148 considering what it's capable of doing 30 to 512 MHz Frequency Coverage in one package with Type 1 COMSEC (DoD) Encryption / Decryption . The RACAL webpage states that you must have deep pocket assuming they mean $$$$$$...
by Ghostwriter
Sun Sep 25, 2005 6:12 pm
Forum: General Chatter
Topic: HF amplifier problem
Replies: 9
Views: 4075

Hi Brett, Lightning Strike, Yes I know first hand at what that can do to electrical and electronic equipment. At the end of April, 2005, we had an early morning thunderstorm with air to ground strikes. I have a Rohn 120' SSV tower in my backyard and although it's grounded with 10' Copperweld stakes,...
by Ghostwriter
Sat Sep 24, 2005 2:15 pm
Forum: General Chatter
Topic: HF amplifier problem
Replies: 9
Views: 4075

Hello Brett, Now this project makes perfect sense to me. Ooooh, I hate when RF over driving semiconductors occurs as it normally releases that little puff of smoke in the form of Greenback $$$$$ . I was wondering if you were able to stabilize the RF devices from the spurious / self oscillation / fly...
by Ghostwriter
Fri Sep 23, 2005 3:25 pm
Forum: General Chatter
Topic: HF amplifier problem
Replies: 9
Views: 4075

Brett, I'm just trying to understand your own theory why you would take a perfectly good working RF Amplifier that's rated at 140 Watts Output and attempt changing the two output transistor devices to increase the RF Power to 200 Watts Output ? This is a +2 dBm increase that can only be detected on ...
by Ghostwriter
Wed Sep 21, 2005 1:30 am
Forum: Harris Public Safety Communications (PSPC) Equipment
Topic: M/A Comm Opensky
Replies: 23
Views: 10367

M/A-com's OpenSky TDMA Digital Trunking Network

You Guys crack me up :D This M/A-com OpenSky TDMA 800 MHz 25 kHz RF Channel Spacing Digital Trunking Radio Network with AMBE Encryption is nothing more than a modified /\/\ iDEN Digital Radio Network that was sold to NEXTEL 10 to 12 years ago! And your jumping up and down about the digital noise the...