Price survey on ferrite toroids and clamp-ons for ham RFI applications Gary NA6O. Updated Sept. 20, 2017. Showing only suppliers with websites that list inventory and allow online ordering. Prices an
Heres a link to an old paper that was mentioned awhile back here on TowerTalk that answers the conductivity questions about plating. Long story short: Silver plating may not be as conductive as solid
For high-power BPFs, weve switched from 403A to the ones made by VA6AM. Lower cost, slightly better performance, and very nice fabrication. Pavel is also a nice guy to deal with and will customize hi
Hi Maximo, The calculation you need in order to produce series impedance is this: Z = 100*(1-S21)/S21 Note that these are all complex values. If your VNA has built-in math capability, use that. Other
Price survey on ferrite toroids and clamp-ons for ham RFI applications Gary NA6O. Updated Sept. 20, 2017. Showing only suppliers with websites that list inventory and allow online ordering. When orde
https://va6am.com/. Highly recommended. Measured performance of his bandpass filters is slightly better than 4O3A and at a lower price. Both have excellent build quality and will serve you well in a
Comprehensive price list below, fairly up to date. I mark all my cores with a silver Sharpie. -- Price survey on ferrite toroids and clamp-ons for ham RFI applications Gary NA6O. Updated May 3, 2018.
Really? I just checked my list and found most of them are the same as they were in May, and some that were actually lower. The ones with ridiculously high prices like Palomar are of course always th
The main place for ACOM info that Ive used is the Yahoo group acom-list, with 1100 members. Gary NA6O _______________________________________________ _______________________________________________ T
We have two Big RAKs at N6RO that have been turning a pair of shorty 4-el 40m Yagis for many years. We use their controllers with the two-button mouse interface. All you have to do is pay attention w
There is a fairly easy way to get an 80m dipole (or inverted vee) to match on 30m. ( I use this same trick to get a 40m dipole to match perfectly on 15.) On each side, 1/3 of the way out from the f
I need two plates to fit Rohn 65G: An internal rotator shelf, and a top plate for a thrust bearing. K0XG offers a rotator shelf but is totally unresponsive to email or phone messages; maybe I'll writ
First, thanks to Grant, KZ1W for supplying detailed drawings and instructions for the parts he fabricated. Another option: I called Rohn and it turns out they do make a plain top plate for their 65G
Now we know who... Saw this today in the ARRL Letter (linked from QRZ.com). -Gary NA6O Well-known northeastern Pennsylvania radio amateur Leland L. Lee Parsons III, N3LPJ, lost his life on June 14 du
Im about to put in a radial field but the area is infested with Angus. Terrain is in its natural state, never graded, planted or anything, just coarse grass and weeds and pretty rocky and uneven. I w
The advice so far is consistent: Other than moderately deep burial, any other radial installation will eventually become cow chow. Some background. This is a 30 ft commercial tower on a ridge top tha
I helped a friend with a new R9. The big problem is very narrow usable bandwidth especially on 80, where as I recall its about 25 kHz 3:1. Almost as narrow on 40. Hes a new ham who mostly does FT8 o
Put the RT-21 in DEBUG mode. That disables all error checking. Then use the CW/CCW buttons to try and jog the motor. Then youll know for sure if its movable; youre basically just applying voltage to
At N6RO we have full-sized #12 wire verticals, each with two elevated radials and a Comtek box. Dump power reaches 5% over a bandwidth of 140 kHz, and 10% over a bandwidth of 300 kHz. SWR is of cours
No, the code cannot be installed on a server. Here is a link to the EULA: https://ipo.llnl.gov/content/assets/docs/technologies/nec.pdf <https://ipo.llnl.gov/content/assets/docs/technologies/nec.pdf>