HR2510 about 15ma of final bias before mic is keyed.
Only showing bias on final before keying not driver. The radio will put out 30W. Bias diode is good. All associated disc. Caps and resistors check good. Unless I missed something. VR112 good. I believe...
View ArticleeBay new payment system
I've been selling on eBay for years but went to sell something today and got a notification that I needed to update my info and use their new payment system. No more paypal for payments. I started the...
View ArticleCobra 2000 final/driver bias question
Is it possible to test and or adjust the final or driver bias if L39 and final is not present at all? I was troubleshooting problem in that area. I pulled the final and L39 choke which burned up. But...
View ArticlePoor receive, please help.
Good evening members, its been a while since I have had a question but this is a doozy! As the title says I am having a receive problem. I have a Wilson 2000 trucker going to a Galaxy DX-949. The unit...
View ArticleCobra 25 LTD ST, 10 Volts at TP2, Blows up C68 1000 25v Capacitors
Hello,Cobra 25 LTD ST, I have 10 Volts at TP2, where I am to turn it down to 3.5 Volts, the radio is making a Pulsing humming noise, and blew up 3 Capacitors as I wanted to diagnose the problem. Has...
View ArticleRemoval of Toshiba yellow "epoxy"
Recapping a Cobra 135XLR, one of the 1000 uFd caps was leaking. On the main board are bodge parts held in place with some yellow glue or epoxy, which I'm assuming is factory by how clean the radio is...
View ArticleCobra 148 - modulates normally then goes nuts
Interesting one this evening. Philippines Cobra 148 GTL - hasn't been run in many years I suspect. Just began testing tonight. Powers on, RX and TX in all modes, PA works with good audio no distortion....
View ArticleQuestion about microphones and the Ranger2995DxCF!
Hello Radio Friends, well I got me a question concerning which mic I should use with my new radio,in the past I have used on my Galaxy Saturn ( back in the 90's) and my Ranger 2950 current base set up(...
View ArticleOld 1980s Echo Module
wondering if anyone remembers the old echo modules that were fully encapsulated in black plastic so you could not copy. Found one in old C2k but the wires beyond black and red are faded and those were...
View ArticleANYONE KNOW WHO BUILT THE TX-600 LINEARS ?
I have a TX-600 linear amp, and I need to get in touch with the guy who made it. It is NOT a Texas Star. It's a 1 x 4 and the transistors are marked "RF100" (driver) and "RF150" (output). I bought it...
View ArticlePublic SDR tuning a radio
Had someone tell me recently that their radio was off frequency on LSB and they didn’t have a freq counter or test equipment so they tuned to a local SDR and made adjustments in the radio until they...
View ArticleCobra 25 WX NW ST,, Audio Amp TA7222AP,, 2 Black short wires ???
Hello, on the Cobra 25 WN,NW,ST on the Audio Chip Amp,,where it is soldered, there are 2 short Black wires added to the solder, and the wires go to the Audio Chip connections, does anyone have a...
View ArticleSILTRONIX VFO 80-5 documentation/ manual?
Does anyone have any documentation on this VFO? 73's KB2LMN
View ArticleUnexpected Interesting Reward!
I wasn't expecting anything in return for my recent efforts on a friends 148GTL-DX but he surprised me with a Shure 444-Demco Edition microphone. He told me the element was no good in the microphone...
View ArticleLayman’s terms
Morning all, can someone explain why a cobra/ uniden style radio drives the snot out of an amplifier and yields better overall results over a standard 10 meter radio like a General Lee connex 3300 ect...
View ArticleCobra 2000 power out and bias.
I am having trouble with biasing of the driver and final. I can’t turn driver down below about 75 ma.and then it drifts about to about 95 ma when keyed . And I can get the final down to about 75-80 at...
View ArticleCobra 148 GTL AM s-meter issue
I have a 148GTL that receives low on AM only. SSB reads fine. When I inject a S-9 signal into the antenna jack the radio's s-meter reads 9 s-units on SSB. When it is injected on the AM side it reads...
View ArticleTram D201 VFO drift fix.
Since restoring my old hand wired D201, I've been using it on SSB for the first time since channel 16 was the place for SSB. As soon as you have to get off the crystal synthesizer board for a frequency...
View ArticleShops to look for in Tennessee, Kentucky, Missouri
On a road trip and currently located in Clarksville TN. To we start another leg towards Williamstown KY then over to Petersburg KY. Following that in back across Missouri on the route back home....
View ArticleHR2510 Bias adjustment? No go...
When going to set the bias, the adjustments VR112, and VR113 won't adjust at all. I have 1.40mah, and zero on the second adjustment we'd nt. Any one have this issue? I am stumped, thank you for any...
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