Guys- I have an aluminum ladder which has 3 joints to enable the 'scaffold-like' function. It was purchased at Lowes, and has the 17(ft). designation, though this may be less than 3 feet wide. The ladder could be 'loaned', yet my sedan is not the best way to transport it. I do not want to suggest that it would be as safe as the real-thing, scaffolding because it has no rail or floor when in scaffold configuration. On a subject unrelated ( except by conversation on 146.94-PL Mhz. ); a few hints about USB to RS-232 or TTL cables: 1. Nearly all start with a USB type A or B connector, to plug into a PC which runs version 2.0 or newer. 2. Almost all are designed to produce an RS-232-'type' or TTL 'type' signal- Note that a TTL level is typically 5 volts where RS-232 often is +/- 12 VDC. 3. FTDI is one of a number of manufacturers of integrated circuit chipsets, and this relates to the smart USB recognition of a USB compliant device. It does not mean that cables made with other chipsets do not work, only that the software drivers typically must match for the cable to have a hope of working. 4. RS-232 is typically seen as three (or more) subsets: 4a. Full handshake- this means that most of 7 signals would be used if a de-9 ( db-9 is a modern misnomer for an overall shell size ) is used. 4b. Part handshake- this means that most of 3 signals and ground would be used, the others typically 'faked' by wiring or no software requirement. 4c. Serial only- software handshaking accomplished by protocols such as "X-on/X-off". Pins 2 & 3 are used, plus one ground for either de-9 or db-25. ( A handshake in digital terms means a method to ensure that all equipment in the link knows when data may be passed, for fear of one side sending more than the other can receive - buffers ( storage areas ) would overflow without handshaking, and a loss of information then occurs ). Serial only has no hardware handshaking, the information about channel overflow is sent with the data as 'escape codes' such as 'control - S ' and ' control -R '. 5. Not all amateur radios can accept RS-232 levels, many older ones only accept TTL levels. 6. Additional information regarding Baofeng and other 'more difficult' radios is to be found on the Tech Forums sections of QRZ dot com and Facebook Amateur Radio groups. 7. It is rumored that some Baofeng radios require that the radio be in a special 'mode' provoked by the keyboard to display success in programming, and that new software is available with extra features. Most recommend making a solid 'backup' file of a good read before attempting any programming. I hope that both Rick and Jo (NSB) find the information above handy.
Jon L. Livingston, Electronics Technician 17722 Fieldglen Drive ( SE of FM529 & B.Cypress) Houston, Texas 77084 [email protected] (832)-591-0082 mobile Cellular General Radiotelephone license PGGB062294 CET Wireless Communications WCM-R150251 Amateur Radio license KB0MNM ----- Original Message ----- From: "Rick Hiller via BVARC" <[email protected]> To: "BRAZOS VALLEY AMATEUR RADIO CLUB" <[email protected]> Cc: [email protected] Sent: Sunday, June 12, 2016 3:12:01 PM Subject: [BVARC] Antenna work platform needed to borrow/rent I need about a 6 foot high by 6 foot long by 3 foot wide work platform for some future antenna work. Ideal would be a single section of scaffolding. Anybody have a single scaffolding section I could borrow/rent? Or…suggest where I could get such or something similar? Thanks…….Rick – W5RH _______________________________________________ BVARC mailing list [email protected] http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org
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