Well people this is ex-K1TA and I'm back after bugging out for a few years with a new call W6AH. Yep that's right W6 Adam Henry. It's the type of call you have one of two opinions about. Either you n
I recently obtained a used socket for an amplifier project I'm about to work on and have a few questions for the list. First, though the socket has alot of miles on it it looks in very good shape. It
The IMD data for the 4CX350FJ looks quite attractive ! -45 db 3rd order products and -50 db 5th order products. Without negative feedback. http://www.g8wrb.org/data/Eimac/4CX350FJ.pdf The price of 4C
Whether you should proceed ? By all means ! Though glass tubes in general and the 4-1000A in particular can be considered a novelty at this point in time this is exactly the type of tube you want to
OK then here it comes Steve. :-) First let's start with an excerpt from Care and Feeding of Power grid Tubes which is posted on Eimac's Website page 96: [I]It is possible by clever manipulation of el
Before you close the case Tom something else for you to consider. To drive a GG Amp you place watts on the cathode. To drive a Grounded Cathode Amp you place volts on the grid. This provides you with
And the listing includes the auctioners callsign. This guy is as sharp as a marble ! Further investigation reveals ole Howard was first licensed in 1997 as KD5CGO and upgraded from Tech to Extra in o
Newer 3-500s were manufactured with a strain relief mounted on the base pins. Does this necessitate a different chimney ? I see two different chmineys listed in the RF Parts manual one measuring 4 1/
For the younger guys on the list. Neon lamps can also serve a very important function in Amplifier Construction, that of a stray RF Detector. They will glow in the presence of RF energy and come in q
You got it. Make sure your ambient light is down to a low level, turn the amp or transmitter on and run the bulb over it the cabinet. And remember the axiom "RF loves seams" Bob W6AH ________________
Looks like a clone of the old Alpha 91B _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
There are number of factors Harold including the circuit design of how the SSB Signal is generated. After that the number of amplifier stages and how clean they are determine what type of signal is g
Does Eimac still manufacture them or was their production discontinued at the time Eimac pulled the plug on 8874s ? _______________________________________________ Amps mailing list Amps@contesting.c
Right you are Karl Arne. Using any type of coax between the output side of the network and the tube cathode is an open invitation for trouble. At harmonic frequencies that piece of coax can look like
Allow me to provide clarification. I wrote: "A work around that he found was to remove the output cap on the input network bandswitch and attach it directly to the tube cathode." That should read: A
Bob The biggest issue you have to deal with is how much effort you want to put into the project versus the available economic resources. The LDG Circuit is a drop-in arrangement that will give you mi
Bob I'm willing to guess that he will tell you the expertise of people working on amps varies widely and those at the bottom end of the spectrum are of marginal competence. If I sell a few hundred co
Drive power relates to output indirectly as anode voltage, biasing and operating frequency all influence output power. With 3000 volts on the plate OZ1DPR obtained the following 10 watts drive, 400 m
Jos the price of Boonton 59s fluctuate between a range of 50 to 130 US Dollars on EBay. It looks like Carl snagged himself a steal if he picked up the last one auctioned there. A couple of months ago