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Not sure about country of origin, but the tubes were acquired from Command Technologies. I don't know what the tubes would have to do with it...the arc is prior to the tubes in the circuit. Thanks,

New tubes made in China maybe? -- Steve Hearns [ KA2PTE ] Technotronic Dimensions, VT [USA] WWW.TECHNOTRONIC-DIMENSIONS.COM E-Mail: Steve@...

I'd like to know if any of you have suggestions as to what caused this HV arc to chassis and hopefully, what to do to prevent it in the future. Amp is a TenTec Centurion. It was at idle when the arc

Jim, I snapped a pic of the bandswitched input network. You can see the 40M toroid has been overheated, I recall that was the band W6CCP used it on. Note the red paint applied to the mica cap tuning

I guess efficiency and IMD will improve with 6500V at the anode, but 10m will be difficult to tune and on 160m the Gates inductor might be too small in inductance. Mine is run at 4800V, 10-160m on any

Reid, can you safely put 6500 vdc (loaded) on a 3x3 tube ?? ?What about IMD with that voltage ?? ?Most folks are getting 68% eff on the lower bands (160-30m)....with 4800-5500 vdc loaded...and a

In the case of the Hallicrafters S-38 and many many others, the chassis was on one side of the AC line, which could have been hot or neutral depending on how the (non) polarized plug was inserted into

<We hams experience this leakage current often in ungrounded old tube equipment that have large capacitors bypassing the AC line. These capacitors are connected from each side of the incoming AC line

Alan, Didn't matter. It got more written which is a good thing. Good story on the fridge. Bob W4JFA [email protected]> wrote:

On Mon, Nov 4, 2024 at 06:41 PM, Eric wrote: Ooops... my bad! LOL I didn't even know there was an "Electrical Improvements" thread here. I can delete my post if desired... *ON EDIT:* Post deleted.

On 11/4/2024 12:02 PM, Alan - W5ARM wrote: > /On Mon, Nov 4, 2024 at 12:28 PM, Bob wrote:/ > /You mentioned never open the neutral. Earlier talking about a shock > by touching the stove and

It was in the Electrical Improvements thread on this group. Eric

Alan, It wasn't me. Someone wrote that it happened to them. Maybe it was another group? Bob W4JFA [email protected]> wrote:

Alan, I have touted this modification on here for years now. ?I’ve explained as you have numerous times. ?Hopefully this finally sinks on. ?The folks at Henry May be good RF engineers but fell

Alan, That dual 240v receptacle you have pictured is exactly what I have in my shack. I looked for one locally with no luck. Like you said, Amazon had it. You mentioned never open the neutral. Earlier

Wow... nice! Well then, sorry for the long dissertation on power systems... *:-/* But yes, the jumper trick works perfectly. Super-easy with no permanent mod's to the amp. And, you can properly ground

I was considering the modification you suggested.......and also wondering about the design choices made by Henry. ....retired EE that paid for tuition as an electrician.... It was a powerful

There is nothing to "isolate", with respect to the neutral and grounding systems, within the amplifier. They are not inter-connected in any way; the amp is NOT grounded by the green wire. The "green"

Hello Eric, Sorry, I'm a little late to the party on this one, however I will inject my 2-cents worth... I have a few Henry amp's (four, to be exact) as well as several other brands & models (i like

well, it should be obvious some CB'er tried to make it work on 27megs. I note one inductor looks un connected on the loading side as if someone had it configured as a Pi-L at some point? Meanwhile I