Recent content by Naysayer

Parallel Xfrmr successful! Easily >1kw :giggle: into DL. That straining noise/hum from being underpowered is completely gone. Tomorrow I'll try the 20A Air Conditioner outlet near operating location after I seal it up again. I fused the external Xfrmr ("X") Hot lead to primary. Began...

I finished the wiring. I replaced all wiring from the IEC320 jack thru soft start to transformer primaries (chassis mounted xfrmrs) with 12 gauge. Picked up about 25-50mA plate current from that alone as I used smaller wire when I began years ago. I placed the SHV jacks in corner top of...

Yes, I see now. It's obvious when the leads are switched. Thank you everyone for running this down for me. Transformers separately are only .5v off from each other on my cheapo VOM meter (Yet, it is the best of the cheapo's lol) Morning after: Transformers working in parallel when powered...

Thanks for verifying that. Parts begin arriving today. I'm tempted to power the external primary from a separate AC outlet (polarized plugs/reduce wires), but I can decide the pro's & cons later. Xfrmr secondaries will join at the HVPS board (Nomads) where 2 resistors (ww 7.5R 5w Vishay, 1%)...

Follow-up Question on Parallel Polarity of transformers: If the Primary parallel connections determine Secondary polarity, is it correct to conclude that it doesn't matter how the primaries are connected? As long as the secondaries are correctly adjusted thereafter?

I'll use a 3rd transformer to place low volts on primaries. The internal xfrmr connects to HVPS board with 1.5' of 22awg HV wire. I'll need two, 5' lengths of HV wire to connect external xfrmr secondary. Can I use the same 22awg HV wire or does the 4' difference in wire length justify...

Thank you for the helpful Replies. I'll need to temp disconnect the mounted xfmr to make the low voltage comparisons. The Primaries don't matter? Appears I can pass on the Dot Convention Tester as I can't justify it now. My request for help on the FT-891 Keying issue got a detailed Reply...

Following 2 paras are cut & paste from other forums that address my Rabbit Hole option: "You can dependably connect 2 AC sources IF they are synchronous or can be made synchronous assuming they are at about the same voltage level and can supply matching currents of similar impedance. Fuses...

Not as simple as I thought. Preparing to connect 2 Heathkit 54-30transformers: Single Pri/Sec windings for 110v to 1800v at 400mA with a CT. I need more plate current. The 54-30's are potted with no markings regarding phase (direction of windings around core), I don't have an oscilloscope but...

Settled on SHV connectors. $16 for two pair, panel mount females, new from China. USA-made prices 3 times as high which I can't justify on a homebrew experiment, at best. Rated to 5kv more than double the VAC used. Damn keying circuit driving me nuts, I'm considering a CB type COR to trigger...

Had to delete the words about the Keying Interface. There will be more about this. I can say that the only thing inside of it is a small 12v Omron relay Q6K-2F-Y and nothing else. Low plate current has limited amp output but yesterday I got lucky on eBay. Found another 54-30 plate...

Ordered a Keying buffer/interface from associate radio on ebay. No way around this unless I make one. Keying ain't what it used to be. Been tweaking here and there. I had to relocate the Soviet vacuum relay. Linkage kept jamming. It is the B1B-1B model which was the cheapest I could find at...

just because you can, doesn't mean you should. I get that lol.

Assembled: $255. https://newdiytech.com/products/atu-atu-1000w-antenna-tuner Kit form: $150 https://newdiytech.com/products/atu-1000-atu1000-atu-1kw-atu1000w-automatic-antenna-tuner-7x7-atu-1000w-by-n7ddc-diy-kit Based on N7DDC Auto ATU board I've never used an Auto ATU but the price has...

I'm beginning to PO with antennas. 20M remains difficult to find & Tune, almost impossible and when do-able it beats the snot out of the tubes. It's my next problem to solve. Maybe the plate choke (it lost a few turns over the years. 10 & 15 will tune with less fuss and 40 is a can't miss...