MegaWatt vs. Chinese Imitation 30 amp switching power supply comparison
In an earlier thread about the various switching power supplies available on Amazon, there were questions posted about the difference between the authentic American made MegaWatt 30 amp supply and the...
View ArticleUniden pc78ltd dead key adjustment?
I have a new Uniden pc78ltd anniversary radio that is smt, I can't find anywhere on how to lower the dead key and turn up the modulation on this radio? does it have adjustment pots to do a simple tune...
View ArticleBand Allocation (older newbie question)
I have a question about 300 MHz - ~ 400 MHz band allocation. Specifically; why am I receiving stereo commercial radio in the aforementioned band? There seems to be a simulcast for almost every station...
View ArticleHF Rig Amperage Question
If a transceiver requires 23 amps at full power (100 watts) to transmit, is it safe to say it will need about 11.5 amps at 50% power and 2.3 at 10%? Or is the progression different for some reason?
View ArticleDoes different coax affect swr?
Forgive me but the project in question is at home and I'm on the road currently. I'm not getting into another coax length battle, so here we go. Current setup, Sirio performer 5000, lmr 400 ultraflex...
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Cobra 29 no modulation
Next in the stack of radios from the unknown. Is a 1998 cobra 29 with a KEPL-255 board. The radio receives and it has a 5 watt carrier but no mod. I went thru with my FC and have the frequency from the...
View ArticleGood info about grounding.
The following link discusses wind turbine towers but the info is equally applicable to antenna towers. Lot's of links and good reading. Lightning Protection
View ArticleCobra 21X 23 Channel Mobile? Dual Final??
I have a question, I was looking inside my Cobra 21X 23 Channel radio and it looks like it has dual finals. Here is the scoop, On the rear left of the radio attached to an aluminum plate is two NEC...
View ArticleOptima MK3
I have an Optima MK3 that I ordered from coldfrontsales on 1-30-16. I opened it to change the mode, and nothing else was touched. I also drilled the hole over the mic, but other than that it hasn't...
View ArticleIcom IC-T70A mod - First on the internet!
This is the extended TX/RX mod for the new Icom IC-T70A: Preliminary, disassembly steps First remove the battery Remove the two screws that are on the heat sink / case at the base of the radio that...
View ArticleNew antenna from Sirio Gain-Master
New 5/8 antenna from Sirio Italy.:drool: Gain-Master, the new reference in its class of antennas
View ArticleAnyone running the Sirio P5000 in their mobile
just wondering if anyone is using the P5000 in their mobile. I've had this antenna along with the magnet base for three years now and it is still rocking along like it was new. Just like my Gain Master...
View ArticleIs the RCI 2970N4 suitable for driving an amp?
I have a new 2970N4 (built in 4 pill) and was considering trying to use it to drive a 12-pill in the mobile. I would like to use the radio as a nice driver, putting out an easy 250 watts PEP. Has...
View Articlediy full wave 11 meter loop antenna question
I want to build a "Bambi" or full wave loop antenna with 27.38500 as my center of the band. I read on some sites that I DO NOT need a feed point Transformer. I read on most sites that I DO NEED a feed...
View ArticleOptima MK3
Going to sell my Optima MK3 . I bought the Radio Dec 2015 so I have had it for a year. I always use external speakers on my Mobil radios, This radio was used as a base on a power supply and was never...
View ArticleCRE 8900 TX Star DX250 HDV 575 Mic
All work great. Selling for a friend. $450. Having problems with loading pics.
View ArticleI have a cobra 89xlr
i have a cobra 89xlr but the the strip that goes to the channel selector came apart now it won't show channel where to find a replacement?
View ArticleCobra 29 RX Problem making an old man go nuts!
Hey guys I need some help! I really hate asking for help but this radio has just about made me check into the nut house! I have a Cobra 29 LTD NW that has no RX what so ever. No RX/ S meter reading as...
View ArticleAny thoughts on this wire antenna?
This is called a "Bi-square" or "Saturn" antenna. Any of you wire antenna guys know about this? I was looking at this today....again, and I don't see nor can I fine any measurements for the gap at the...
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