I have had quite a long discussion going on the Heathkit Amps E-Mail Reflector, and thought for those of you here not on that list might like some of the information I have done with this amp. Especi
Interesting, I was curious on this also, so Googled it and Pasternack has a datasheet for RG-213U and it says it is only 5K Max. Operating Voltage(VRMS): 5000 https://www.pasternack.com/images/Produc
I really did not "Have To" but because the new caps were soooo much shorter than the originals I was ABLE to. and in doing so then did not have to drastically modify the chassis as the ZL guy did. Jo
aLL SHE COULD MAKE HE HE HE i KNOW i KNOW. bUT WITH THAT ACTIVE BIAS THE TUBES BARELY CHANGED COLOR AT MOSE A DULL RED. SO THOUGHT i WAS SAFE. oopS cAPLOCK Anyway I did not know the weak link was the
The 20 pound doughnut works great! BIG OUTPUT. To remain Legal have to drop drive. Now.... As Columbo would say. "One More Thing" I really miss the active Bias circuit that was in this amp. And befor
Has anyone installed one of these into their SB-220? http://www.ameritron.com/Product.php?productid=EBS-1H Joe WB9SBD Schematic is attached. Thanks 73 Jim W7RY On 5/10/2019 9:52 AM, Lou Everett, Sr.
So, Would running the AMP Up-Side-Down possibly un "SAG" the offending part and the tube work again maybe? Joe WB9SBD Sig The Original Rolling Ball Clock Idle Tyme Idle-Tyme.com http://www.idle-tyme.
I want to Thank EVERYONE who helped me bring this old SB-220 back from the Grave. It so far is working beyond my expectations. So much so that I am actually somewhat scared of what other part may not
On 10/30/2019 8:56 AM, Joe wrote: Morning Dick, If you are not afraid of making a few electrical and mechanical modifications, I would go with this transformer. https://www.antekinc.com/as-8t800-800v
Why need them? Run it at the HV side and use less drive and less currents all around. The CW/SSB switch I converted into a stand-by switch. Joe WB9SBD Sig The Original Rolling Ball Clock Idle Tyme Id
Umm Nope, 3500+ The plate voltage meter is not quite HARD pegged but easily over full scale. When testing at lower voltages for the in vs out ratios and with the in that I have I'm calculating close
It is wired up the same way as the original heathkit transformer. the two output coils in series. 1600+ volts Joe WB9SBD Sig The Original Rolling Ball Clock Idle Tyme Idle-Tyme.com http://www.idle-ty
What's the plate current meter at the 600 Watts? 80 watts of drive and only 600 Watts out seems awful low. actual under load plate voltages and currents? Joe WB9SBD Sig The Original Rolling Ball Cloc
2 KW+ OUT for 100 bucks? Hmmmm? Joe WB9SBD Sig The Original Rolling Ball Clock Idle Tyme Idle-Tyme.com http://www.idle-tyme.com On 1/11/2020 9:50 PM, MU 4CX250B wrote: A cool tube, Hsu, kind of a thr
For tubes like this, BIG currents on the filaments. Has anyone made a switcher supply for it? Joe WB9SBD 73 Peter Conrad, I built a 150MHz amp using a 3cX20000 for an industrial customer. This tube i
where from? Joe WB9SBD Sig The Original Rolling Ball Clock Idle Tyme Idle-Tyme.com http://www.idle-tyme.com On 2/23/2020 12:48 PM, Kevin Adam wrote: I got pole pig 3k volts 240 volts When get checked
What's wrong with it? Joe WB9SBD Sig The Original Rolling Ball Clock Idle Tyme Idle-Tyme.com http://www.idle-tyme.com On 2/25/2020 7:08 PM, Doug Renwick wrote: OK I am asking too much. Reduced to $10
What is the current (pun intended) max grid current for a pair of 3-500Z's now days? And does it matter what the Plate voltage is? Joe WB9SBD 73 Rob K5UJ _____________________________________________
I'm thinking 3500/3600 plate voltage or so Joe WB9SBD Sig The Original Rolling Ball Clock Idle Tyme Idle-Tyme.com http://www.idle-tyme.com On 10/8/2020 1:05 PM, Rob Atkinson wrote: On Thu, Oct 8, 202
But distilled water is highly corrosive. I'd worry about what it may pull out of anything it touches. Joe WB9SBD On 2/13/2021 11:08 AM, Jim Thomson wrote: Is it possible to use distilled water in a h