power dissipation, I bet. Something with negative resistance would be best, as a true crowbar, otherwise it has to be sized to take some heat. shawn kb1ckt Sent from my iPad
Being less than 40 means I went through the education system post-metric, and metric was taught. What did not occur was any place outside the classroom to use metric. Personally I think in inches, ga
Don't know try to plug in a mic. If there is a spot for it, then it must not be original. And odd! Otherwise, spin the knob, see if the pto turns freely. I think there is a dial cord on this one, and
Meter set to swr? Otherwise I wonder if a diode or solder joint open d up and is not measuring forward power. what panel meter, the one on the radio or on the power supply? Does the Corsair read out
Can you use it with the cover off? If so, I would run it until the problem occurs, then feel and see if anything is hot. Do some voltage checks, see more f any do not check against the manual. If you
Do the lights flicker at keydown? My TenTec does, and I figured it was from the 14g wiring I used. Can you hook up a voltmeter to one of the acc 12V jacks? that should tell right away if there is a v
I am sure it can be repaired... but at what cost? If it takes an hour to occur, it might wind up being many hours of labor. Might be time to sell as a tech special, or to find a friend who would not
Hello, I have an Omni C, and I am toying with getting a remote vfo. Managed to bump the vfo on mine during a qso, twice no less in one day, while adjusting RIT. Would a 263 work on mine? I believe th
I'm thinking of taking my Argosy to Nearfest (along with a pair of 2591's), and I'm wondering what is a good price to try to sell it for. Ballpark if you will. It is working, but many scratches (I'
For their new 539 QRP transciever--but I don't see a 539 on their websight. ? Shawn Upton, KB1CKT NAQCC 4723 ________________________________ From: Mr Mike <kf8zn@yahoo.com> To: "tentec@contesting
Interesting. I have been thinking of tossing the FT-817 into the car, but 5W into a low-efficency antenna has deterred me thus far. This amp is too big for that job. I didn't look to see how it was
It's been years since I designed an active filter; but IIRC one could recenter the filter by multiplying the R's and the C's by new_center_frequency / old_center_frequency. Basically, the capacitors
One of the first things I did with my 1340 was apply power backwards. Oops. All the IC's got replaced, and on the advice of TenTec, the final too. I don't think anything else was damaged. After that
I'd look for a cold solderjoint or the like. Do you have the manual? If not, it is online at TenTec's website; going through the listed DC voltages may shed light as to where the problem is. Shawn Up
Years ago I did the upgrade mod's to my Argosy (diodes in the mixer, and AF rolloff), only to find it drifted. I'm starting to wonder if that might have been due to the dial cord--I recall it not mov
Speaking of the Argosy 525 analog version, I have a question. I bought one a decade ago, and made a few contacts on it, but made the mistake of doing the upgrades (mixer diodes I think, certainly the
I don't have the schematic in front of me, but going by the previously given link I do recall now it being a discrete diode mixer. Actually, I think there may be a pre-amp there too, been a while, th
Engines can cost a few grand, more if imported. Many of the sensors are "isolated" by whatever control unit they talk to--they do not always get power directly from the battery. It's possible that if