Did anyone hear about the rubber mat we were talking about at the beginning of this thread??? Alex I once built a common under a computer floor out of 6 inch wide copper strap every three feet in a g
Do you HAVE to be as old as we are to realise this? It's not that we don't realize, but I have forgotten it several times...... Don W4DNR _______________________________________________ Amps mailing
I suppose if someone *really* wanted to solve the two-prong 220 issue, they could put a 1:1 220vac isolation transformer before their hamshack feed and use the secondary centertap as the "common" , a
Quoting TexasRF@aol.com: I assume this is also the reason that 240v three phase systems have 208vac between legs? No........... 240Volt 3 phase has 240 between legs. 208 three phase has 208 between l
Sorry to belabor this some, but if we read Mr. Parascondola's first message about the presence of voltage inside some Ameritron amplifiers, he seemed to say that it did matter which side of the hot a
Even at my own home, powered from my very own microhydro turbine, I follow the same standard. Pictures !! Send Pictures !! Don W4DNR _______________________________________________ Amps mailing list
Quoting wt8r@aol.com: Can anyone suggest how this conundrum may have occurred? Thanks & 73 de Dave, WT8R Low Duty Cycle. Don W4DNR _______________________________________________ Amps mailing list Am
Joe, Relying on ANY protective device around High Voltage is putting your life in someone else's hands. Bleeder resistors fail Shorting bars fail And YES, even shorting sticks can fail In over forty
Nothing wrong with a triode, but you can have more control with a tetrode. Working with a 4cx12,000 last night, I noticed that with zero screen voltage the transmitter was able to make around 10% rat
Quoting Jim Thomson <jim.thom@telus.net>: The old fella had removed the top lid with the amp powered on !! He was gonna poke about inside to find the problem. If the safety device was not there, he w
http://www.broadcastboxes.com/products/SiteSentry4_lit.html or look at the larger Scion 8 http://www.broadcastboxes.com/products/sicon8_lit.html Don W4DNR I have been asked to look into the possibili
So now that we know UHF connectors impedance means beans until 500 MHz ... Which is more reliable In the long term N or UHF? I build both N and UHF connectors with solder. I build both in a way that
Agreed. BUT doing "what you can" should not extend to publishing a gain figure that is inaccurate, with no justification for how it is arrived at. I "suspect" that the gain reference was a typical 1/
How much grid voltage swing for AB1 ? ( how many watts into a 50 ohm load ) Don W4DNR Even CBers can build stable grid driven 4X5's! It is a very hard tube to make oscillate. The SK300A socket requir
Wait, I enjoy the banter. Don't stop now. Some people just can't take the heat. Keep it coming. Doug I like this forum for it's strong opinions. No sugar-coating here. Don W4DNR ____________________
It could be epoxy and if so, prolonged insertion in boiling water may work. No guarantee. 73 Peter G3RZP MEK from the paint store. A disposable aluminum turkey or ham cooking pan from Wally World. Do
And just to hijack this further, I think it's more important to have a wide uninterrupted copper ground plane between the major components ... input / cathode/tuning cap/loading cap/ output connector
Someone said that the Dahl database was lost.. Has this changed ? Don W4DNR Hammond Manufacturing http://www.hammondmfg.com/5cindex.htm Ray Shatzel, W2XC is one of the radio amateurs at Hammond, Mfg.
He Said ........ "Untested. I have not powered this unit nor do I know the last time that it was powered." Translation : " Untested on Air. I plugged it in and it blew the breaker off the wall and se
Will the cathode quiver, cause the filment to shiver, the grid load abate, doing harm to the plate? Coax or Strap ? That's the Flap !! Should we use an air-gap , or just trust the loading Cap ? Don W