Short version: Does anyone have a parts list for the SG-237? I need to know what sort of diodes D1-D4, D8 are. Long version: I borrowed a whip/mount & SG-237...
Hello Dom, http://www.sgcworld.com/Publications/Downloads/troubleshoot.pdf Here is the link to SGC trouble shooting page. This should help you to isolate the...
... They are surface mount versions of 1N914 diodes. You can either order them, or use 1N914's and tack solder them in on the appropriate tabs on the circuit...
I have the same problem. I could not find a pictorial of the board so I can determine which diode is which. Can someone direct me to a site with this. ThanX,...
... Cool, got it. How would I test the transformer? Pull it out of cct & measure coil resistance? ... Thanks, but cannot find a parts list yet. 1N914 is a...
I have a 2x16M dipole at 30 feet, using 10 feet 450 ohm and a choke balun (numerous beads around RG213) on the transmitter side of the tuner. I cannot make it...
I assume you mean a dipole with about 48 feet of radiator on each side. This would be a normal tunable radiator for 40 meters and up depending on how it is...
I am about to install my SG-230 at the base of an Inverted L, and will be using the 54-70 DC coaxial line isolators to run the DC about 70' to the base of the...
The couplers work fine but you normall won't need Smart Lock for a fixed antenna unless 747s fly real close by. However, if you need to do a RESET to the...
First of all, thanks for replying! It´s only on the otherwise problemfree bands i have troublefree performance, on those with problems, like 28MHz, there´s...
Previous experience with the 230 mounted outside in a weatherproof container feeding an inverted L was quite effective. A new QTH presents a unique problem...
I have it now... The G5RV depends on an exact length of 450 ohm ladder line for it matching to the dipole. You would be better off for an indoor antenna to...
Behalf Of pa4doc Hello all, I am not an antenna Guru but First of all.... RTFM They manual states clearly that these tuners are mainly made to feed high...
This is exactly what i´ve been doing, only i have a feeder 10 feet long due to some impractibilities with connecting the tuner directly to the feeding-point,...
Hi Ron, Your post pasted below, with my comments in [brackets]... "...I'm able to use an outside inverted V of 52 ft per side fed with ladder line entering the...
I have posted some photos of the waterproof enclosure that I have my SG-237 mounted in. I picked up three of these boxes on ebay for $15.00 each and have to...
Ron, You might want to substitute the #8 ground wire with a length of 1" wide (or wider) flat braid. This has more to do with RF grounding than DC grounding....
Hi folks! - I currently have a home brew (coaxial) trap dipole mounted in my attic that covers 80,40,30,20,15 and 10 meters. While it does resonate on 75...
A dipole is a balanced antenna... You want to keep both sides the same length. Having one side shorter than the other skews the radiation pattern worse than RF...
... all good ... every antenna is a compromise, just choose the one you're happiest with (that fits your params the best, size, price, tune-ability, Q...) ... ...
Thank you both for taking the time to comment. FYI - the trap dipole I constructed is shown here: http://degood.org/coaxtrap/ I had to bend the ends back at...
... From: Don Roher To: Smartuners@yahoogroups.com Sent: Saturday, November 18, 2006 11:33 PM Subject: Re: [Smartuners] SGC-239 with Attic Mounted Home Brew...
The SG-239 and the selected configurations favored by SGC show the coupler at the input of the antenna. This is favored to keep RF off the coax. Why does the...
I've a SGC 230 contected to an inverted L (about 28m long) with a good conterpoise and earth connection. It all worked well until recently. The set up still...
I have had it happen with my 237 while mobile. The only way I can tell you to avoid it is to use/make a smartlock and lock it after tuning. Then it wont do...
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