Yea, I should NOT have let my fingers do the talking. And the choice brew is from a local brewery. It is not any of that wimpy 3.2 % stuff either. 73 Bob, K4TAX Trouble from the 90+ degrees, grass cu
Ever see a Continental AM Broadcast transmitter? In some of the models you will find the last stage to be a big linear amplifier. Of course those were used long ago when we weren't worried about heat
That is one source of the many birdies that is typically found in the Omni VI and Omni VI Plus series. As one that used the radio on 10M as the IF for my EME equipment, the birdies at or near the noi
Regarding AM modulation, regardless of the modulation scheme or method, 100% pos and neg modulation is 100% modulation. The methods employed to attain this make absolutely no difference in the PEP va
The original DX-60 and versions there after are controlled carrier modulation. Thus they changed the voltage on the screen grid from some resting value, representing carrier with no modulation, to in
Recall I said I'd been mowing the lawn and I tossed down a couple of cold ones to relieve the heat. As to the "Made in the USA straight Tennessee Whiskey", that's sippin' stuff, .......not tossing do
There is no way to do this with the AL-80B. A tube such as the 3-500 does not need any "burn in" time. 73 Bob, K4TAX -- Original Message -- From: "Rodney" <w3krq@dejazzd.com> To: <wb5jnc@centurytel.n
I have an Ameritron AL-80B on my desk that I drive with my Omni VII. It does not have a dedicated HV or FIL switch. When the amp is switched ON, it brings up, with delay, the filament voltage and the
If it were an external anode tube with a indirectly heated cathode a burn-in period would be appropriate. With a glass envelope tube and a coated filament, there is no need to burn-in the 3-500. The
In as much as the glass envelope contains a very high vacuum, as a safety precaution, most tube companies suggest handling with gloves in the event of breakage and subsequent implosion. And one shoul
The good news is that the Eagle has been located and retrieved. So all is well and UPS has been so notified. The bad news, apparently the UPS driver does not know street names or numbers or doesn't c
Well the real crux of the story. There's 2 parts, of which this is the 2nd part. Yes I shipped the Eagle 599 and manual to a friend in FL. Later that evening while trying to answer a question on one
Having owned and repaired many of these radios, I do not recall the Paragon as having "opt 3". To the best of my knowledge and documentation, the only radio where "opt 3" terminology was used is the
Change the PBT a bit. Usually this moves them such they aren't objectionable. I don't recall mine. I'll check when I get back to where the radio is located as we are traveling at present. 73 Bob K4TA
Many to most design parameters do change radically when converting from BIPOLAR to MOSFET devices. I seen to think MFJ does have their products in the reach of the average ham. I find typically they
In the case where an amp uses 2 tubes, do replace both if there is a failure. And I spend the extra $$ for the matched pair or quad as the case may be. 73 Bob K4TAX Sent from my iPhone
Please don't use used or pulls for a 2 tube amp. The way they're designed one tube may be drawing 60 Ma grid current and the other 200 ma. Yet a total of 260 ma would be normal. Grid to filament is t
This is a Very good way to determine the condition of a tube. Just be sure one knows the expected results. If they don't match within 10% or so, I'd have 2nd thoughts as to using them as a pair. 73 B
Best experience and best advice is to ways tune the amp for max output while keeping drive and loading such that maximum recommended plate current and maximum recommended grid current are not exceede