I use a pair of GPSDO's. One Trimble THUNDERBOLT on GPS and one u-blox m8t on Galileo GPS. I find my m8t on Galileo has better short term stability and phase noise so I use it primarily and use the Trimble on GPS as a sanity check.
Excellent video! I'm wondering if there would be any meaningful measurement change if you were to feed an analog 2 tone signal into the mic jack (IDK but I suspect not). Perhaps you could use the 2 tone generator in the LP-500. Cheers & 73 - Steve KG4LJB
K.I.S.S. I tried a similar trick with the check engine light on my girlfriends car when she had to take it in for the california emissions inspection. Unfortunately it did not work, but ya can't blame the girl for trying. LoL... The international DX rule of thumb is too much is never enough! You now Need another 4000a and their combiner network, so you can play with the big boys. Or maybe a twin tube cx3000a7? LoL!
You are comparing the 'CB Speaker' which is fitted as stock inside that Box that we pay a lot of money for (if you purchase the SP-101) which has the same cheap speaker that is what I call a CB Speaker as it is the same sort of cheap speaker that used to be fitted inside most old CB Radios, anyway it is a speaker that costs around a £1 to a Studio Powered Speaker, There is very little to compare, quality wise you can tell the difference, but in reality we would be happy with either, it is best to upgrade the speaker in the power supply/speaker and also the SP-101 enclosure speaker as well, the difference then is a lot better, and much more round performance, and if you baffle the speaker as best that we can without going to extremes then it improves the speaker again. All this said the average operator that does not work with audio systems much would be happy with what they get out of the box, I was amazed when I upgraded the speaker units to even a moderately better model of Speaker costing around £10 each , the sound was greatly improved, I later upgraded again using a set of mission Speakers costing around £200 each, and was disappointed that the performance was not improved a lot more, installing the Visaton FRW10N which cost around £10 each is a 'good' upgrade over the cheap £1 speaker units that Yaesu use, they even use the same cheap speaker in the SP-9000 as well. A Powered monitor running through a good amplifier will always out perform the stock internal speakers. Good Video though, Thanks...
Wow, did you drill through your concrete floor (in your cellar) to set the 8 foot ground rods? If so, do you ever wonder about bugs and things getting in from underneath your house? I guess water is not an issue since you live in a high elevation above the water table? Thanks for all the great info!
Yes, I drilled a hole for the ground rod in my office under the desk, two actually. Just put some silicone calk to seal the hole around the ground rood. No issues with bugs. The cellar floor is dirt, 3 more ground roods in the cellar.
i have 9100b stereo ...it sounds super in am and in hf ...i,m looking for the front board with leds as yours ...do you know where can find one???i mean as you have open the frond panel i can see the board with the led meters .....any help?|??
My tip keeps melting? _ Just kidding great video and excellent technique. Hats off. Bout time some one on RU-vid did it right ! 73 and happy DX to you.
Great job on the grounding. nice station you have also. where'd you get them single connectors for the #4 wire mounted on the L brackets at the tower legs?
I have posted videos on how to put on the PL-259 by not soldering but I have to admit, I do like soldered on connectors and in the last couple of days have been updating some of my coax and connectors. The non-soldered connections work fine and I tend to use them outside for repair when running an extension cord, etc. and soldering is difficult. I really like the way you dress the end of the coax and screw the PL-259 on - I did that on the connectors, as you show in the video, and soldered thru the holes and I really like it. In the past, if I soldered thru the holes, I just let the outer cover of the coax go in maybe 1/4 inch at the most but your method is superior by screwing the connector on more like 1/2 inch. Thanks for posting. BTW - I use a 325 watt Weller soldering gun to solder. I believe in getting it hot and soldering it quickly and then give it plenty of time to cool so the dielectric doesn't deform. I am also a big fan of the Times Microwave brand of LMR-400-DB. Excellent video. 73 WA4QGA
Only time I ever twist them on without soldering is when its temporary or receive only. SDR and R7000 get moved around so much I just don't bother but on a rig with wattage. Solder and tested every time. Only takes one angle hair and a second of miss guided attention to let the magic smoke out.. ✌
Wow, that’s even more motion than my SteppIR Urban Beam. Great work with your videos, by the way. Your tower project and 6M RFI sleuthing videos were particularly helpful. Do you have another video of your tower raising?
I know what he’s talking about….but there is really not much left of the sweet TLM-103 after all that processing and the resultant 3-4k TX audio. Nice gear and a beautiful ham bench though folks don’t need to spend 1200 on a mic unless your doing podcasts or voice over work as your main gig. I do love the large diaphragm condensers though. A 140.00 AT-2035 would give the same result.
I have the 5371A, I'll have to try this with the stock BG7TBL reference I have. I originally looked for a 53310A but most of them were a bit over priced or had seen some rough service.
They come up now and then for a good deal. I bought two and combined the best parts of each to make one nice, fully optioned unit, then sold the second for what I paid for it.
Nice shack, you are a Pro. I rewired and run all new cable in my main shack last year, and then tagged all the lines. All new grounding. I have a craw space which is a life saver. It was a major job but should have been done years ago. Hope to work you soon K0UO
I’m a little intimidated to attempt this for the first time. I finally have a high powered radio combination so I purchased the lmr400 coax but afraid to do this wrong and hurt my equipment.
Only one way to learn. I ruined or messed up many connectors before I got good at it. It takes time and practice. Take your time and if you do it like in this, or other videos, you will get there.
@@ChristiannTyler Thats an option but not for full power use. Its creating a capacitive junction to the inner braid. Great time saver for barefoot power.
Thanks Damon, very helpful for me because I have the same problem 😞. How do you terminate J6007 with 50 Ohm for adjustment? What sort of plug is this. I cannot find anything that fits...
I did find the connector on a jumper to a BNC, I dont recall where from. However, I found no reason to terminate J6007 since no RF is being generated. I've made the adjustments both ways, J6007 terminated and without, no difference.
Those two ginormous toroid power xfmr's in the OM amp must be producing one helluva magnetic flux-field! And being right there on the right-side of the amp - virtually inches from the radio - must've been enough to affect the radio's circuits. Damn! I've got an OM-2000A+, which is similar in construction and layout to the 40001A, but only one power xfmr (and only one tube). Mine is (was) sitting directly above the radio (101D), with 4-5 inches of vertical clearance. Never had an issue. Your new layout looks like it will work well. Anyway, glad you got 'er fixed! Thanks for sharing... 73, ~Alan
-34 in the 3rd order is way way better then the original finals from Yaesu with improper bias'ing. They should watch your video and train the tech's in Japan. Most 101 200 watt models with the AMC in the wrong direction I measure over the air and witness on the panadaptor are usually are about -28... The best I've seen are of course the Apache Labs Anan's at -62 in the third order at 1500 watts. Great video Thanks, N4QNT
@@damonkj7e I was referring to the two AC plugs on the back of the amp. Thanks for the feedback. I'd love to chat with you more in-depth about this as I will be buying an Amp in this class in 2024.
This amp runs on 240v and can draw more than 8,000 watts input power. So that's more than 33 amps, the input power has to be divided between each C19 power plug. The way the power supply is designed, its most efficient if fed from 2 phase 240 which is found in many parts of the world, just not common in the US where we have single phase 240.
@@damonkj7e I just got done running a 20amp 240V 2-phase power to my shack. Additionally I've run two dedicated 20amp 120v circuits. I guess I was not expecting to see two power plugs on the back of the amp. Is there the expectation that this amp is plugged into two separate 120v circuits? (which is par for the course for me, as that 240 line was a complete pain to run... ) :)
Its not, its plugged in to a pair of 20amp, 240v circuits. The OM4001A needs 40amp at 240v. If you live in the US, 240v is actually single phase where the 120v is derived from a center tap on the 240v single phase. In EU, they have true 2 phase 240v which gives you 100Hz ripple (50Hz per phase) post rectifier to the filter bank and provides a more stable B+.
Thanks for your videos about the HP 8920. Looks like you've replaced the display with the LCD kit that's available on Ebay. Did you do a video about that replacement? How did the replacement go? Is the 8920 any lighter with the LCD instead of the CRT?
Yes, its the Simmconlabs NewScopeJR LCD kit, you can get it for a better price if you do direct rather than eBay. I did not do a video of the display replacement.
