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At 2:1 SWR you only lose 10 watts when the transmitter is set at 100 watts!

Do you know why the Volume on the radio shack 202 with all of a sudden get low or you couldn't hear it

This Realistic DX-160 radio has a dissimilar metal problem on the tuning printed circuit board with the rivets that connect the top side printed circuit to the printed circuit on the bottom side of the PC board. Resoldering is not sufficient, the fix is to solder jumper wires on the top side of the board to replace the connection made by the printed circuit on the bottom side. Shining a bright light through the bottom of the board shows clearly where to solder the jumper wires on the top side. This is the RF amp and Local Oscillator circuit so it will require alignment. Operation without repair may be intermittent.

This radio has a problem on the tuning printed circuit board with the rivets that connect the top side printed circuit to the printed circuit on the bottom side of the PC board. The fix is to solder jumper wires on the top side of the board to replace the connection made by the printed circuit on the bottom side. Shining a bright light through the bottom of the board shows clearly where to solder the jumper wires. This is the RF amp and Local Oscillator circuit so it will require alignment. Operation without repair may be intermittent.

Not antenna wires....you mean ignition wires...right?

If meter still works in PEP mode Without DC power then its a HOAX capacitor PEP circuit, DC is only for LED.. .. 😊

Digital modes were designed for use with low power. Their nature is to be functional at 25 watts or less. There is no reason whatsoever to use a linear amplifier with digital modes! Doing so just makes a mess of our crowded bands! This is especially true for the FT4 FT8 modes!

How did you set your your screens so perfectly!? I can’t seem to get it right

Use a two tone test .73 AE4OY WILLIE PEACOCK

Can you please post a link to those snap RF choke ferrites?

I've still got my htx202. I got to buy a battery pack for it then I'm selling it because my license expired

Do you have a video about the interface between the IC7300 and Amp? I have the same equipment (IC7300 and AL-811). I am very new to this and want to make sure I am doing it correctly. I will mostly use digital. I would want to be at 50% duty cycle for digital. SSB I would max it out. Any advice is much appreciated. Thank you! De W4MTJ

First, that tuner is not rated for the power that the map will do, and second, the meter goes between the amp and the tuner. The 300 watts listed on the tuner is transmitter input power, so the tuner could safely handle 180 watts on SSB and maybe 150 watts CW and digital. That's based on 60% efficiency of the transmitter. 300 x 0.60 = 180 watts.

i have mobile phone for digital mods.. Whats the point

Russian rebranded tubes 😅😅😅.. Can see them miles away...

Thats because you clipped that long piece of inductor called a WIRE in line with that capacitor. Why didn't you just mount the cap and set it with the set screws?

wont be due to diodes. just remove them to test. Likely due to alignment issue on Band E

Are you running the 909 " Matcher", between the radio and the tuner, (929)....or between the Tuner (929), and the antenna ?

It's been 8 years since you uploaded this vid....can only hope for a response. I have a Kenwood TS-50S and will soon have an assortment of Shark Ham sticks to employ with it from the mobile. My question for you is do i need to have an "Interface" cable connected to my radio for the 929 to " Tune" ? Or will the unit tune by just manually pressing tune on the face of the unit. My Kenwood does have an tuner interface " Out", on the back but I suspect that cable would be " Unabtanium" , based on the age of my radio and the fact they haven't made that model in about 17 years !

Dragachain.

Looking back, this was actually a bad shopping experience.

Your very small garden is massive compared to my no-garden HOA townhouse. With no garden, one must become more creative since there's no place to run radials. I have those child-anti-falloutta-da- second-floor window gates, so I secured one at about a 45 degree angle down, and attached to it my Shark mini 40 hamstick. That gets it up high and away from the very nearby utility cables in the strteet. The gate serves as my counterpoise.

He's worried about too much voltage from a stupid battery pack but if you plug in a cigarette lighter adaptor into the HTX-202 and use it with your car running, the radio is working very safely on 13.8 volts. Turn off your engine but leave the car in accessory position, it's still getting about 12 volts. And when you plug in that same plug with 13.8 volts into the top of your HTX-202, it's cutting out whatever battery pack you might have installed, so it's powering the radio in the same way (the power wires are going to the same place inside the radio). Which means you could put in a battery pack with 9 AA batteries (if you had one or could find such a pack) and it would also power the same radio with 13.5 volts!! Perfectly fine!! I'd feel comfortable powering my HTX-202 with up to 15 volts. I have an unregulated wall wart that I use for mine and just listening and not transmitting, it's at about 15.1 volts nominal. When transmitting, since its unregulated, it then loads down to less that 12 volts since it's using more current on transmit. Since I mostly use it to just listen, my 202 runs constantly on that 15.1 volts for many, many hours and I've been doing it for years.

I have since learned to calculate plate dissipation based on plate current and HV. I upgraded to a Palstar power meter to ensure accurate calculations. I hope to do another video soon demonstrating this, as I think it's very important when operating vacuum tube amps on digital modes.

Im amazed that you have a tuner on top of that amp. Mine gets way too hot to do that.

One thing that could be causing this is your electronic injection system. One other thing I have found is any device creating interference can easily cause it through its power feed wires. Example, led lights pull amperage in fast pulses causing the voltage in the feed wires to fluctuate and become antennas. Put capacitors on as close to the noisy device as possible. Values are hard to suggest I'd say about 1uf. You almost can't go too big.

Nice old Acura!

You didnt calibrate it

where did you get that front panel mount for the IC-706 MK2G? Barry VE3ISX

I have a Hustler 75m coil, and looking at your video, I wonder if I could add that to my 17’ telescopic whip. 10-20m with the whip, add the Hustler coil to get 40m and 80m? Ideas? Oh. I have an MFJ auto-tuner.

AM is much more susceptible to noise and interference than FM

You do need to technically make the antenna resinate. Not use the tuner as much as possible . More so in a mobile. The tuner as we know only exist for the radio. Not the antenna. Get you some small coated copper wire and wind it around seven turns at about one inch and a quarter in diameter . This is a much better alternative to adding a capacitor. This kind of shunt can be adjusted while on the antenna.

The pack says ICON? 🤣😂

The 404 variant of this was my 1st n fave ham rig. Had it till year & half ago when some screwup movers either stole it or dumped it. It was $200 here in canada (202 was $400 at the time) so got the 404 1st. Just managed to get another 202 at a hamvest this morning & it works other than the wrong antenna was included & the existing battery (the original I'm sure) is stiffer than pushing a frozen brickhouse uphill. I still love these things which is why I looked specifically for 1 at the hamfest.

How are you not frying the antenna tunner? I have the same one and it is rated to only 300 watts of power.

How do you get your computer to announce new state? Do any of the programs you have can be used with a screen reader?

Nice vintage computer, I see a 5 1/4 floppy drive. Nice video, thanks for sharing.

Never test a antenna with a runner inline The runner tunes the coax and antenna all in one ...u will never get a true understand of the antenna or load if the runner is lien to the transmitter...in Wich is what a runner does ..tells the tx mutter that we have 50 ohms with low resistance well actually none .along with very low to zero omic resistance... .remwber u can have a antenna that has wonder swr but not resinate and vice vrs...you want low vswr at the resinate frequency and across the occupied band your planning on using it ..I never use a runner ...useless tool...just build.the antenna to the frequency u Wich to tx on and trash the runner...just my opinion..but they are useless in my opinion... Only use is to multi work bands on one.antenna but not the way to do things.... If u want to truly tune your antenna or load ...u measure the load itself with a 1/2 wavelength entrival of feed line ...and use a analyzer to do so.... Always use a 1/2 wavelength feed line when tunning ...this way after it's tunned u can use any length of the characteristics impedence is same as feed point....best of luck ......

The over swing is the pep vomited circuit working and the diode shotkeys doing the job ...remeber u will.always get your truest most accurate reading closest to the value of measurement...so if u measuring 100 watts do it on 200 what scale not 2000...and if your testing 7 or 10 then obviously put it on 20 not 200...this will insure that you linear always..hince if the circuit is working right ..I own several of the mfj .I have the 891 myself along with others they are very very very accurate and read within .oo2 of a watt to a bird 43...very solid meter on average for.sure they r right

7 years later i still watch this video..good one mate

does do vhf uhf

(1600*300e-03-300)/3=60W which is about the limit for anode dissipation per tube👍🏻

It was very good information I have an 811 I don’t usually run it too hard but thank you and I hope you’re watching if you have any other videos God bless

Hi there! A DX-150 was my first SWL radio as a teenager and I loved it. Many hours in front of the dial listening to the many stations around the world! So, yous was broken but it looks like you fixed it. The diodes you used are probably just fine but if you want an "exact" fix, replace those diodes with 1N60 diodes. which I am 99% sure would be an exact replacement in that circuit. I have a DX-160 sitting out in my shop that I am going to re-cap. Plan to use Nichicon Gold series, audio caps for that job.. That, and a re-alignment and that rx will be back to as new again!

In many RV parks antennas are also against the rules, but for the most part, I have never been bothered yet as I am a QRP man and TVI is a problem mostly of the past. I do get billions of birdies from PWM charge converters though so I am in the process of setting up for Parks on the Air which involves less QRN and more fresh air, LOL. Cheers, Dave - KU9L

As a novel approach, how about replacing the spark plug and coil wires with a high quality HV coax (with100% shield/braiding) and then ground both ends of the cable shield to a good ground. The only tricky part is carefully removing the old plug boot connectors and re-attaching them to the HV coax. HV Coax is available in ratings from around 5kV up to 150kV dielectric. For auto applications, a 25 -30kV rating should be fine. This will also improve spark plug energy since most spark plug wires have around 10k - 20Kohms of resistance so you'll get more power to the plugs which can help improve fuel combustion which will improve MPG. Also, most HV coax I've seen is rated to 200 degrees C (392F) so it will easily withstand the heat under the hood.

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placing a tuner between your rig and the amp is not necessary.

What does it do?