I can attest to the capabilities of the old Trimm headphones. In my pre-novice days (1963-1964) of building code practice oscillators, my dad came up with a set for the project. They were old even th
Don: Its probably a 2.4 kHz wide 9 MHz filter. This was standard equipment in the first i.f. of Omnis and Corsairs, but some (many?) of us replaced them with the 8-pole 9 MHz filter for better skirt
I'm not familiar with the TT regens, but don't forget that regens are pretty broad, which might be a problem on a busy band. Also, the TT regens do not have vernier tuning dials, just coarse and fine
I swapped the same filter into my Corsair years ago. It made a very noticeable improvement in skirt selectivity on both SSB and CW. Highly recommended! 73, Bob WB2VUF Mike Hyder -N4NT- wrote: It'll b
Ron, I don't have the answer to your question, but I have a question. Is there any AM activity on 10? I ran 10 meter AM for many years but I haven't heard any for the past few years. 73, Bob WB2VUF
Max, I added the 8 pole filter to my Corsair and noticed an immediate difference. The skirt selectivity is greatly improved. The passband tuning is much sharper: a little tweak of the PBT and adjacen
Hello, Ray, I have the 1220 with the amplifier. It is fun to build, but a little quirky. Some users report the need to connect extra internal ground wires to the power amp board. I had one problem: t
Here are some mods that I just put into my Paragon (I): If slow AGC is too fast for you, pull the IF/AF board and change C46 from 10 uf to 22 uf. Fast AGC is unaffected. If 22 uf makes it too slow, t
A strange problem with my 1220: When using repeater offsets, release the PTT and instead of going back to the receive frequency, the rig goes to the input (transmit frequency). Key the radio again an
Yes, the Scout has a meter lamp. Its plugged into a little grommet in the side of the meter. I added a 56 ohm resistor in series with mine to dim it down a little and prolong its life. A more clever
Gary, I used light aluminum "L" brackets attached to a 12 V computer type fan. The brackets are attached to the heat sink on my Paragon using aluminum foil tape. Not elegant, but easy to remove and n
My Scout came from the factory with a low dropout regulator. I think that it is a 2940 chip which drops out at 11 V. Is there a 10 V regulator with a lower dropout than that? 73,
Mark, et al,: I have used my Scout with a 7 amp hour gel cell battery and I have not had a problem running it for a couple of hours of casual or Field Day type operation. It is possible to buy indivi
Yes, this can be done and there are several inverters on the market. The pulse width modulator types are undoubtedly the most efficient. A lot of them are intended for the commercial or military mark
Here's something interesting: ICOM is showing a ne IC-703 on their web site. It appears that it is still under development, but it is interesting to compare specs with the Argo. The ICOM runs 10 W an
I think that the 2940 regulator needs 11 V minimum, but there are lots of places for voltage drop ahead of the regulator: The power cable, fuse and fuse holder, power switch, power connector, and the
Thanks for the info, Adam. I hope that Ten Tec will take advantage of the world commercial market, too. I recall that Paragons were sold to the U. S. government under a GSA contract. Fortunately, thi
Thanks to those who have been posting first impressions of the 516. At first I thought it was overpriced, but now I'm not so sure, when one compares it to the Argonaut 515 ($400) or the Argo II ($120
Check to see if there are any computer monitors running in or near the shack. Bring a portable receiver out to the pole to see if it is the cause. Check to see if there is a pattern to the noise as a
No, no, NO! Please DO NOT whack the pole with a sledge hammer. If there is any loose hardware or wiring it will come down ON YOUR HEAD. Plus, you will be liable for any damage you cause to the pole.