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It would take the op all of 30 secs to parallel the 2 x 100 ohm resistors and see if they are inductive.? ?Heck only 1 is required for this test.

Thanks for all the replies. I don't need a dummy load, I just have this stuff laying around. I'll probably just try for the heck of it. Again, thanks for the replies.

Hi – I would say giver it a try. Put it together and then use a network or antenna analyzer and check the DL for return loss. 73 – Mike Mike B. Feher, N4FS 89 Arnold Blvd. Howell NJ 07731

Scott, I may be reading too much into this, but when people post to a group named "ham-amplifiers" and mention "a couple 1KW ... resistors" I can only assume that they plan to homebrew an HF dummy

Mite want to check the SWR of it or a scan with a VNA or some such to see how it looks. A -- "Where the Old Soo crossed the New Soo" Duplainville, Wisconsin Web page: Http:/www.dupyrail.com Youtube

Reminds me, I built a dummy load with twenty half watt 1000 ohm resistors in parallel between two coax braids dunked in a gallon of ND30 motor oil in a one gallon pain can. I haven't killed it yet

You can always take two of the 50 ohm resistors in series, paralleled with another two 50 ohm resistors in series. Should give you 400 watts of dissipation. I'm using 2 paralleled strings of 4-100 ohm

John, Does the datasheet for that "planar resistor" say it's non-inductive? If not, then it probably won't work as a dummy load, except at audio. ebay has some 50 ohm non-inductive resistors but

I'm wondering if a Planar resistor can be used for an RF dummy load. I have a couple 1KW 100 ohm Planar resistors and an 18# heat sink, I can't find my answer anywhere. Any information will be greatly

Jim, that sound about right. Years ago I ran a Ranger and a Thunderbolt amp. This combo is very inefficient. In AM mode they ran the pair of 4-400 with 350 MA if idle current. Then, they had your

Just curious, the feed through power of a G-G Amp might be ~ 2 to 5% of the power output when the tube has a high Mu. For a low Mu tube, that could be upwards of 20%. The self modulated control grid

The tube hi-pot tests 30 kv (anode to grid)...and? 5 kv (grid to cathode).? This is normal for a 3x10.

I went to local "Lowe's" hardware (may not be same in VE) and bought foam filter material ($4) and cut to fit. https://www.lowes.com/pd/Frost-King/1196229 Frost King 15-in W x 24-in L x 0.1875-in

Scott, KB1SEL (amprepairguy.com) has a recently rebuilt (by Econco) Svetlana 3CX-10,000A7 for sale.? ZERO hours on the rebuilt tube....and also a full warranty. Contact Scott Mitchell at

This is why I bought that 0-15 kvdc? hi-pot tester from W8JI.? Ur dead in the water without it. Hi-pot from anode to grid ( with grid temp bonded to cathode) Then hi-pot from grid to cathode ( with

Thanks Alek. Another friend mentioned a tube tester. I have one but it's put away and hasn't been powered up for about 7 years. I'll have to see if it'll test them. 73 Bob W4JFA [email protected]>

It is very simple to check. Use a 1kV Megger or even a 500V one and measure between grid and filament and I bet it will show big conduction. You will also see the blue glow deep inside and the

Lou, No intention on using it again. It would be good to be able to diagnose for the future. Since it blew the fuse immediately it didn't appear to be a heat issue to me but the explanation above

9 times outta 10 you won’t find a shorted tube ohming ?it with a meter. ?If you catch a tube short with a meter it’s because the grid is obliterated and debris is all over. ?Once Chinese tubes

If the tube is loose and rolling around, you can get / make / borrow a 6.3V supply and hook up the filament with clip leads. You don't need a socket, and you especially don't need the amp that the