Both of my Titans show low plate voltage, but they output 1500+ watts. I believe the shunt resistor is known to be a problem. I believe I have a reference that describes the issue and will look in my
There is formula that provides an approximate answer. However, when I went to use it recently, I couldn't find it. So I went to the Cardwell site and took data on their specifications for breakdown v
Thanks for raising the issue. I have a 1200 and it's reading low HV also and, in addition, the plate current meter is not registering at all. I suspected the resistors were the issue in both cases. N
I think I read in a recent post that the Svetlana 3CX800s do not work well at VHF frequencies. I have heard a similar negative report from one well-known VHF amp manufacturer. I recently purchased se
If someone has a junker Henry VHF amp or similar and would like to part with the anode ring assembly for the 3CX800A7, I would like to buy it. Henry no longer supplies them. TNX and 73, Joe K2XX ____
Dave, I'll wager that the grid current readout is pegging because the 4.7 ohm resistor, R17, on the bias switch board is open. I believe this is a 1% resistor. If you call John Maples at TT, he will
TEL AVIV (MarketWatch) -- Motorola Inc., (MOT <http://www.marketwatch.com/quotes/mot>: Motorola, Inc. the Schaumburg, Ill., communications-equipment giant, said on Monday that it bid $108 million for
From Dennis, K7BV: Friends, By now, many of you may have heard that Vertex Standard Co., Ltd, (Vertex Standard USAâs parent company) announced that they have agreed to form a collaborative join
Check on the Collins list. If you can't get one, there was a w0 fabricating and selling them. When I had my 30S1, I used one of his an it worked perfectly. 73, Joe K2XX ______________________________
Jim, K1QX, Craig (Radio Works?), sold me 500' of Teflon coated #12. I'll wager he can supply #10. 73, Joe K2XX _______________________________________________ Amps mailing list Amps@contesting.com ht
If you have one, I'd appreciate it if you'd e-mail or fax me a copy. I have one, but it's hand scrawled and the details are blurry. Thanks and 73, Joe K2XX ___________________________________________
I'm 99% sure that the Mirage amp needs a new final transistor. I also have the manual, schematic, etc. I need a three section broadcast variable at about 350 pF per section. They used to give them aw
John and others, I went through an extensive search for replacement blower motors, though not the blower itself, a year or two ago. I also have a copy of the original drawings and specifications for
Charly, check the power switch, rocker switch on the front panel. I have a vague recollection of having had problems with an intermittent switch on my 425 and curing it easily with contact cleaner. I
The translator in the Google tool bar did the whole page. 73, Joe K2XX _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listin
There is no plate current indication and the plate voltage readout is low on my VHF-1200. Power output is normal. I presume the meter resistors have gone west and/or changed value. A reviewer on Eham
Yes, I had made the second mod option below on my former 30S-1 and it worked well. I was using the original power transformer and, while it never faltered, it did do some serious humming. 73, Joe K2X
There is a writeup by a K6 that details how to accomplish this mod. It's pretty simple. I'm sure if you check into the Collins reflector, somebody there will help you. 73, Joe K2XX __________________
Pete, you can download the manual here: http://www.mods.dk/manual.php?brand=collins. You also ought to subscribe to the Collins mailing list and/or Usenet group. W The guys there are extremely knowle