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 91 
 on: January 16, 2021, 08:34:51 PM 
Started by Opcom - Last post by W3SLK
Steve said:
Quote
Sounds like a great idea. Who wants to be the point man?
Shouldn't it be 'Pin-man'?  Wink

 92 
 on: January 16, 2021, 05:26:02 PM 
Started by Opcom - Last post by Steve - K4HX
Sounds like a great idea. Who wants to be the point man?

 93 
 on: January 16, 2021, 12:44:10 PM 
Started by KL7OF - Last post by AMLOVER
Hi,

the following schematic is working for years in my installation. I use 5 transformers for 10Kv/3A. You can use as many transformers as you wish in order to reach your desired dc voltage. You can energize them from one phase or from different phases and in case you wish less voltage, you can use part of them. You can of course energize them randomly, no problem at all who will be the first or the second or the last one.
Use bridges and caps for at least 3x the secondary ac voltage of each transformer.
High voltages need very special care Ö TAKE ALWAYS THAT CARE Ö.

Stefano

 94 
 on: January 16, 2021, 11:02:51 AM 
Started by W2PFY - Last post by W1RKW
I use Brave as a browser.  It seems to be the fastest of all the browsers out there and memory usage is the smallest as well which is good for older and slower machines.  Works great for blocking trackers and ad blocking better than some of the more popular browsers IMO.

 95 
 on: January 16, 2021, 09:36:12 AM 
Started by Opcom - Last post by K8DI
Suggest maybe make a stickied thread with only a daily post, to reduce clutter, and then have members pm the person overseeing it with suggestions or submissions.

That said, an oddball favorite of mine is the 8417...

Ed

 96 
 on: January 16, 2021, 06:29:06 AM 
Started by vk3alk - Last post by M0VRF
OK, as a few folk have PM'd me.....

I'm happy to supply part built (ALL SMT parts fitted) PCB's.

I'll need to know the frequencies you intend to use as the design uses a preprogrammed PIC to control the AD9850 DDS and I'll have to program in the frequencies (DIP SW selectable, a rotary front panel control can of course be added by the constructor)

You'll just have to supply your own toroids 2 x T200-2's and 3 x T106-2's (change these to -1's if for 160m or 80m) and 4 x CREE SiC FETs. Plus the Drain caps, series tuning and LPF caps, these are available from Farnell.

These VISHAY 2KV jobbies are nice...

40m Drain caps 2420175
160m Drain caps 2906248

FETs

40m = C3M0280090D
80m = C3M0065090D
160M = C3M0060065D

I can provide full instructions, waveforms to look for, CAD data to mount the PCB to a heatsink and everything you may need.

For the 200W design you're going to need 96V (2 x 48V 10A smpsu's in series)

For the 100W design a single 48V 10A smpsu.

Credit to Nigel for 'Modernising' the design and Steve or course for coming up with all the info in the first place.

Having a PCB makes this a fairly simple and repeatable affair.

Regards to All.

JohnB.

 97 
 on: January 16, 2021, 12:03:33 AM 
Started by Opcom - Last post by KL7OF
Good topic....I have a few tubes that are interesting ...I'll post them..This is history and actually may be useful in the future...

 98 
 on: January 15, 2021, 09:45:33 PM 
Started by W2PFY - Last post by W3SLK
Edge uses pretty much the same 'engine' as that of Chrome. I've been pretty happy with Firefox. Now they added a 'fence' that prevents FB from tracking you from one site to the other.
Norm, I agree! The only real advantage to the NWS site is that you can get your forecast without suffering through tons of ad banners. Those of us running on ADSL (I'm lucky if I have 1.8Mb download!), it makes a big difference! The resolution of the radar data, even in RAW format is substantially lacking! To move and change your display format is pretty 'kludgy'. One thing that I do like from Weather Bug is the Lightning Tracker! It is damn accurate. I was playing golf when a storm rolled in. I saw lightning hit on the other side of I-80 where I was playing. In seconds, the tracker had the strike called right where it hit. Fortunately for me I made it to the club house unscathed!

 99 
 on: January 15, 2021, 09:36:38 PM 
Started by W1RC - Last post by W3SLK
I think about what my 'heirs' may have to do once I am one with the aether. While getting the gear out that I purchased from Joe, N3IBX(SK) estate, I contemplated how they would get the Gates BC-1T out of his basement. I'm sure that it met its fate with the sawzall. We struggled quite a bit getting the BC-610 out and that was as much that 4 people could muster! These are the apex of boatanchor transmitters. So I think you could get them cheaper. At one time I was hunting for an RCA BTA-500MX. But like stated previously, I didn't want to laden my heirs with the job of selling it let alone remove it from the basement.

 100 
 on: January 15, 2021, 09:24:14 PM 
Started by KA3EKH - Last post by Opcom
I wonder if anyone has done a study to see how many members of our community have become Silent Keys due to Covid? Itís very real, I had it, and got through it. Stay safe, we donít need to see more SK members.

I doubt they have added a checkbox "Ham Radio Operator" to a death certificate form.

No, but with the power of computerized scrapers and the information included in the Feecees database, coupled with the online obituaries, it wouldn't be much more than trivial to figure out a lot of it.

Morbid coding, though.

--Shane
KD6VXI

Hire a Goth to do it..

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