RM Italy KL 503 test

[@ERICtheLATE]

That slab of power supply is awesome!!! It is like a bench for what harnesses it's force.

[@johndyson4109]

You know what's a better power supply a marine battery hooked up to a charger..

[@ERICtheLATE]

@johndyson4109 That sounds real legit, and ultra quiet, once charger is cut out of circuit, but the gas the evaporates from batteries like that is not great for enclosed areas. Gotta get those cctv rated 30 or 80 amp server power units, and get it right around 15v dc.

[@EdzashedFudwinkle]

I run a Kl503 🏧 with the European version of the Anytone 6666 2w Fm and 4-10w Ssb and it works great, 60w is plenty & 350+w on Ssb, i also have the Kl505v which is HF multiband, that is a 250w max amp but works. Currently looking at a Kl805+ & 25v psu for around £800, or an Acom 1000a £1,000. Great video & a new Sub, look forward to the next one. 407 Mcr Uk 👋

[@warrenksanbornjr.6643]

That looks like a good amp I've got the KL-203

[@DeltaXray444]

Great video.. more CB related videos please. New subscriber.

[@rallypoint1]

It’s a nice amp!! You want to lower that am carrier. 4w is a lot. You want a 1:4 ratio. You are barely getting any swing on 5/6 setting. It’s ok for SSB but on AM…yikes. I would say 2-2.5w carrier for AM. Then she would really have a ton of top end!! I have the 203. DK at 30w and swings to 190w. Try it! Anyways just my findings. People talk smack of RM’s but treat them nice and they will talk!!! 73!!

[@omaraziz8884]

hello , What is the mobile transceiver do you recommend that will work well with the RM 503 Amplifer ?

[@rallypoint1]

@@omaraziz8884 Any single final radio…no more than 15-20w PEP. The President McKinley matches up great!!

[@omaraziz8884]

@@rallypoint1 does it also work with usb the same performance? I have a DX5000 plus, but I am facing a problem that it does not work with RM 503. I also tried on a zetagi amplifier, the same problem does not work, and I do not know what the solution is.

[@RT038]

What. Power supply are you using

[@BIPOLARPEOPLE]

whats the swr.are is you useing dummy load

[@omaraziz8884]

Thanks for the explanation. I have a DX 5000 PLUS and I have a RM 503 HD Amplifier, but the problem is that the Amplifier in the Transceiver does not work properly, and the power extracted from the Amplifier does not appear in the watt meter, only the Transceiver power appears. Is there anything in the Transceiver settings for it to work properly? I hope to find the solution. Thank you.

[@MrRichard57000]

First check the kpo without amp,think you can adjust the output power to a few watts(4 to5) only then use it to drive the amp...your radio can do 40 to 50 watts,driving an amp that hard it s going to kill it

[@turboomni848]

I can see why your meter is so popular,,it makes you feel good.

[@frankdiminnie]

Yha gives me the FIZZ but I got it for free from a family member that upgraded his. I know it's no bird 🐦 but gets me ballpark ish. Mostly used as a reference point 👉. If I see the same output every time I can get some idea if my system is running the same. If numbers fall off and I have not changed anything something may of went bad 😞. But thanks for your comment. 73$.

[@turboomni848]

@@frankdiminnie Yes I understand completely. Unless you have a Bird which I do not either [I have a MFJ no better or worse than yours] we use it to see if anything has changed. I feel your meter is more optimistic than my MFJ, ,maybe I should buy one like yours to cheer myself up!!😁

[@Douttawv]

@@frankdiminnie I use to run that same exact meter u have in my 18 wheeler a couple yrs back...great meters far as using for 1k or less..don't ever let anyone tell ya different!! Like u mentioned. Mgreat for getting ya in the ballpark ish..for a reference point is all ya really need...now if ya move up in power to say 2k or more..like running a z box or a 3000 tube type amp..yeh..I'd definitely advise the bird or even one of the LP digital meters!! Thanks for sharing..I just started following ya..so looking forward to more cb related vids for sure!! Crazy d outta wv with tha 4 n 1 wave!! 73s😎✌️

[@arconeagain]

The silver 503 I received was crap. It oscillated from new, and when I transmitted for a short time, it would begin to distort. This I believe was due to the driving mosfet, one driving eight. It doesn't even make sense when you break it down from a KL203. So I bypassed the driver, replaced the eight remaining mosfets with IRF520s, and corrected the input impedance. I also installed multi-turn pots to set the bias voltage to a certain figure and dialed the fets up. I then upped the supply voltage to around 20V (bit under). With 12W pep drive, the unit sings at 300-350 watts, doesn't even get warm with a single, small fan.

[@johndyson4109]

The higher you set the power the less swing you get.. It's a nice amp. but I won't run it over 3 or 4 on the power setting.. Nice amp. I think I'll get one.. suspect say 12 to 15 amps draw has to be more than that..

[@KE8ODY-WV-Ares-Ham-Dad-3O4]

Just curious would a 30 amp power supply run a president Lincoln and a rm Italy kl203p amp pulls about 10 amps

[@kkristopher7413]

Looks like a good amp.

[@frankdiminnie]

So far so good use with I max 2000 can't complain.

[@301-NC]

What’s the lowest deadkey it will still trigger the amp in SSB, also why the delay? Thanks!

[@Acestogie]

Your radio is on AM yet the amp is on SSB with no relay chatter ?

[@frankdiminnie]

Nope when the amp was on ssb the cb was as well. When I took off ssb I put cb on AM you can see that I forget to go back to AM in the video and have to put the cb back to AM. And even if I did not have cb on ssb it's just a relay for the amp. The cb dose not necessarily have to be on SSB for the amp to trigger SSB. Does that make sense? Hope this helps.

[@frankdiminnie]

It will chatter if I try to talk in with cb on SSB and amp not on ssb. I have made that mistake a few times.

[@Acestogie]

@@frankdiminnie Or if the input voltage falls below 12 volts.

[@keithlowry2764]

I've just got kl503 but not quite sure what I should be running it at on dead key am so iam not over driving it on ssb where I mostly worck it every tells me different story thanks

[@frankdiminnie]

I dead key 3 to 4 watts (push the ppt and don't talk in the mike) and swings with a audio to just over 10 Watts. This is how I have been running it for 2 years now with no issues. Most people give me the no more the 2 Watts ore it will blow up but it's still running just fine. Side note I run my power supply at 14.8 volts and it will draw 22 ish amps. Hope it works as good for you as for me. Thanks for the comment. 73$

[@KE8ODY-WV-Ares-Ham-Dad-3O4]

I have a 980 also with a 503 rm italy it claims 1-6 watts dk for the amp

[@Ross-ch2ln]

Max peak watts 400? How is the amp holding up ?

[@frankdiminnie]

So far so good putting 14 v with power supply dead key 4 watts and swing to 11. It was getting a little hot so installed a fan kit for it. It seems to do the trick. Used for skip alot this year was a good skip year. If I could find one for what I paid for this one over a year ago would buy it in a hart beat.

[@zukispur5493]

I've got one too. I do the four and four thing. I never put more than four watts in and I never use it over the four setting. Perfect. Paid £200 for it.

[@Mouthpiece985]

I got dumber watching this video

[@frankdiminnie]

Thanks for your comment. 👍

[@michaelkirkwood3316]

Want to purchase a 503 amp

[@JoeR203]

"Perk"? on the Workman.

[@frankdiminnie]

It is not average if that's what you're asking. It's not the most accurate one out there by far. But pep is in the ballpark.

[@JoeR203]

@@frankdiminnie I was thinking someone misspelled "Peak".

[@JoeR203]

I also like how the radio has "MIKE" gain and not "MIC". My RCI RG-99 has the same thing.

[@TelstarElectronics]

I trust you're NOT making measurements into an antenna?... and you're using a 50-Ohm load. Also, where is your scope? Seeing readings on that meter mean absolutely nothing without seeing the output waveshape is not distorted.

[@jeffschall3784]

Put variable power on your radio and you will be good, maybe open the audio a little bit and you will do alot better.

[@frankdiminnie]

Thanks yes it would a great idea. But this is a bone stock radio from 1980 I just don't have the heart to mod it. I have my uniden pc78 that I use for am. But 90% of the time on the president is SSB. And will not make a big difference. Thanks for your advice.

[@charlessalard4636]

That amp doesn't do that much watts.and not being driven with only 12 watts.i have 503hd

[@frankdiminnie]

Your watt meeter may show different results as you can see it's no bird. Just a cheep workmen. Results may very. I did notice that if you drive it with 13.8 volts or (15 ) volts you will get a little more out of it would not run it long at 15V but I have for testing just to see. I run this amp at 14.8 volts. And have talk with family close (long winded) with no issues. Thanks for you comment. hope this helps.

[@tomstulc9143]

How do you stand the constant static noise that would drive me nuts. No squelch function

[@frankdiminnie]

The president Washington has squelch control. I just did not use it because wanted to show the pre amp was working. Hi thanks for the comments. Next time when I'm talking I will adjust so you all don't have to hear it.

[@EdzashedFudwinkle]

503hd is a high drive 30/35watt max amp, and depending on what voltage it is run at depends on what output it will give, 13.8v is what I use and 280w Fm 320w Ssb was what it put out. I thought it would be good with my 6666, it wasn't, but the Kl503 I would highly recommend, and I think the Kl203/203p is a great little amp too 😉

[@bradleycarlin2664]

Wouldn't recommend them,just picked up a new 503hd. Works on am/fm but not on ssb. They refuse to answer my request for wa warranty . In my opinion pass poor Co.

[@Ma.Mal-]

get rid of the background music

[@rodlink6258]

Awful lot of wattage in for that model. 503 HD Will handle that input without any heat. At least that's what I've experienced with mine

[@frankdiminnie]

Thanks I would agree but do not want to mod the President Washington. And with the fan has been running very cool. It's been just over a year now without any issues.🤞most of my time is spent on 38 lsb anyways. Thanks 73$

[@michaelkirkwood3316]

And also I have a McKinley President McKinley mobile radio and I have it in my girlfriend's truck and I bought her the RM Italy 203 and I have it running out of 102-in steel wheel with about a 1:1.2 SWR running it in about a two and a half what did he maybe two and three quarter not quite a three and out getting 175 Watts out of it and then I also saw video and it may have been rooster I'm not sure the guy out of Tennessee but it was somebody that does these radio deals and they were running the McKinley President McKinley mobile radio and they're running it in one of those straight 503s like you just did this video on and they're driving about three a good solid 3 watt in it they said anything more than that you wouldn't want to get long winded on it talking of course you had fans on yours so that was probably helping and I'm thinking that's what I'm going to do but that video I was watching neighbors hitting about a solid three-watt did key in that 503 and they were getting damn near 375 watts on on the max setting so I don't know it may have been the antenna it may have been because they were running through a dummy load I'm not positive on that but I just know what I saw on the video but I also watched your video and even at that what you were getting was good I just need to know where I can pick up one of those 503

[@alanchatfield4271]

It goes 250/300/350/400/450/500

[@GaryLordsWayMinistry]

I bet all the SSBanders like you using a sideband channel for testing on AM. Now why didn't you show us sideband. The radio does more watts out on SSB.

[@mikestone9129]

Your meter isn't a true peak meter. Your getting average readings. If the meter isn't powered it can't read true peak power. And just because some meters have a lighted display doeasn't mean it's powered.

[@frankdiminnie]

I would have to agree it's a cheep one my brother gave me after he got his Bird 🐦 setup I use it to get me a ballpark. And keep it in line to see if my setup had a drop in power. It's like a CYA. Thanks for your comment. 73s

[@CBPunisher1900]

even the old radioshack meters are better then the workman throw that in the trash

[@marksafley1389]

Workman meters the junk of junk