I've purchased but not yet installed one of these. I have also heard that the pull-ups are required.
Good choice, especially at that price! I considered a pair of these, perhaps built in to the Array Solutions SixPak controller, to drive the SixPack antenna switch and Hamation bandpass filters. I've decided to use a pair of Top Ten BD-Y-SD decoders because I want the manual override capability at two different operator positions and I'm sourcing 12V to an Array Solutions SixPak and a pair of Hamation bandpass filters. The combined current draw might tax some sourcing drivers and the voltage drop of the transistor source drivers in the new Top Ten decoders is supposedly quite low, and the device's data sheet says it'll switch 5 amps. The low voltage drop is important to me because I'm warned that the Array Solutions SixPak switch really needs most of 13V to switch reliably, and you don't have to add very many 0.7V drops together to get into trouble. I may jumper the steering diode in the TTD decoder to further reduce voltage drop, and I think this will be safe because all the 12V at my station is coming from one big supply. If I mix in an ICOM radio I have I'll have to be careful where the +12V is coming from. A perhaps cheaper solution (which I may do if I do this again) might have been to use the W9XT BCD-10 (or a circuit much like it) to drive some small DIP relays and switch the high current source driven devices with the little relays and avoid the transistor voltage drop. Array Solutions sells a $100 "level converter" which essentially does this. Somehow using relays to switch relays seemed clumsy, but it may well be the most cost effective solution. DIP relays aren't very expensive. 73 de Dick, K6KR -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Dave Hachadorian Sent: Monday, February 25, 2008 8:44 AM To: Elecraft Reflector Subject: [Elecraft] W9XT Band Decoder with K3 Is anyone successfully using a W9XT Band Decoder with the K3? Anticipating arrival of my K3 in May, I've just received the decoder and want to mount it into a box. I've seen fragments of conversation on this reflector that 10K pull-up resistors to the 12V supply may be needed on the BCD input lines. If resistors are needed, I want to add them now, rather than later, when the decoder is in the box. Thanks! Dave Hachadorian, K6LL Yuma, AZ _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
