My recently acquired Corsair II has a failed logic board UV eprom (MC68705P3S) that prevents me from operating CW. The eprom failure is the keyer "dit" input stuck close enough to a "low", that about
Allen: I have a programmer and can read a good eprom and make a duplicate. I'll check it tomorrow to see if your eprom is on the list. If someone has a good one, I can make you one providing my pr
Oh, man! Clayton, you're my hero. The prom is a 28-pin, and is UV programmable, rather that EE programmable. I believe the programming of my prom is good. It's just an input gate that's stuck low. If
Allen, The MC68705 is a microprocessor and not an EPROM. It does two functions. It counts the frequency and along with some other parts, displays it. And, as you said, it is also a memory keyer. The
Hi Jerry, That's what I get for attempting to economize text. According to Motorola, either your terminology or mine is correct. Motorola says: "The MC68705P3 (High-Density NMOS) Microcomputer Unit (
Does anyone have a G3TXQ drop-in logic board kit that's surplus to their needs? If so, I could sure use one. Please contact me off-list. TNX es 73, Allen--W7GIF -- Original Message -- From: A R<mailt
On 2/15/2014 3:12 AM, A R wrote: Oh, man! Clayton, you're my hero. The prom is a 28-pin, and is UV programmable, rather that EE programmable. I believe the programming of my prom is good. It's just a
I still have the file from which the boards were made via ExpressPCB; I'm sure Jerry also has a copy. If anyone wants a copy to get more boards they're very welcome. Might be a bit expensive for a on
Thanks, Steve. Let's see what sort of interest develops. I'm certain that your one-off cost comment is spot on. best 73, Allen--W7GIF -- Original Message -- From: Steve Hunt<mailto:steve@karinya.net>
The minimum price would be for ExpressPCB's "standard service" which does _not_ include silk screen or solder resist, but gives you a perfectly usable board. Minimum quantity is 2 for $94 ($47 each);
Hello Steve, I would like to have a copy of your board file. Thanks for your interest in ham radio. Ralph Howes W8BVH I still have the file from which the boards were made via ExpressPCB; I'm sure Je
I've uploaded the ExpressPCB files to my web site. PCB layout: www.karinya.net/g3txq/corsair_display/Corsair%20display.pcb Schematic: www.karinya.net/g3txq/corsair_display/Corsair%20display.sch 73, S
Thanks, Steve. 73, Allen--W7GIF -- Original Message -- From: Steve Hunt<mailto:steve@karinya.net> To: Discussion of Ten-Tec Equipment<mailto:tentec@contesting.com> Sent: Saturday, February 15, 2014 6
Thank you Steve, Ralph Howes W8BVH \ I've uploaded the ExpressPCB files to my web site. PCB layout: www.karinya.net/g3txq/corsair_display/Corsair%20display.pcb Schematic: www.karinya.net/g3txq/corsai
steve, If i remember correctly, those expressPCB files write output files only for express pcb? Can you save the files to gerber247 format? I can tack on some copies next time I have pcbs made Mike B
Mike, It's a proprietary ExpressPCB format and I know of no easy way to convert to a Gerber file. ExpressPCB will do a conversion for you ...... at a price ! Steve G3TXQ If i remember correctly, thos
Thanks, Steve, I guess what they say is so true, there is no such thing as a free lunch. The pcb house I use could make those for about $5-8 a copy (100 pc lots) if they have the gerber 247 files (in
Hi Guys, I can get the boards from China for about $3 each. I have a good friend who can convert the ExpressPCB format to the Gerber format. I would have to buy 10 boards at a time. I would also have
Jerry, if you can get the file converted to gerber files, Id spend the extra money and have them cut. and if you can get them converted, Ill make a few prototypes before a run is made. Mike, WB8VGE S
Hi Mike, I don't think we would need any prototypes since the board design has been proven before. Jerry W5JH "building something without experimenting is just solder practice" Jerry, if you can get