Hello sir I got a nitro 300a with bab capacitor which one is the one you would recommend me to change it?
@oscarrogers9745Күн бұрын
Maverick kid here I have a DNA 400 works on low click on high and it blows the fuse
@tramdr13 сағат бұрын
Hard to say, could be a ton of things. I would take the tubes out first and then try it to see if its a bad tube first.
@user-vi6lw8dx5f3 күн бұрын
Sale me that Pride Bro. Or shall I appropriately inquire, is the amp available to buy? Thanks
@tramdr2 күн бұрын
You about 2 years late, Bro
@horizontal-polarized71033 күн бұрын
Just use the old fluke on diode test.
@wayneholland18323 күн бұрын
Thank You, Great explaination!
@bucketofguts3 күн бұрын
Glad you are better Ned
@danieljohnson84373 күн бұрын
Thx Dr.
@UDX-214 күн бұрын
Good to know, Thanks.
@keithweiss78994 күн бұрын
If you have a meter that is sticking in a certain place try this. Set up a small A. C. power transformer and a pot to divide that voltage down. Set the voltage to zero and hook it to your meter, then slowly turn up the voltage until the meter needle is in the area of sticking. It will be vibrating quite fast because you are putting a.c. on a d.c. meter. Let the meter sit with the needle vibrating on the area it sticks. Give it at least an hour. Overnight is good. After working the meter needle in the area is was sticking, it usually frees it up. Meters usually stick due to not being used. The lubricant hardens. I’ve recovered many meters with this method.
@bblod48964 күн бұрын
Glad you are feeling better. I use a AAA cell and a 20k resistor in series with one lead.
@djlunchmeat77104 күн бұрын
Can t you just use a volt meter on diode tester setting ..negative to negative and positive to positive. If I'm not mistaken.
@USBP294 күн бұрын
Do you know where it is on the mark ii?
@keithweiss78994 күн бұрын
The early mobile D&A Bandit used a strange circuit that had a tube keying circuit. So the power supply squealed all of the time it was turned on. The other strange thing was that it used the power output tubes as a preamp on the receive state! Has anyone out there ever seen such a beast?
@spaceflight10194 күн бұрын
Basic electrical safety rules: if you aren't feeling well don't work on it. It can wait. Electrocution tends to be a permanent thing.
@nomadradio4 күн бұрын
Bravo! Much safer to test the low-voltage stuff with the scary voltages turned off. That little power supply is a swiss-army knife sort of tool.
@peschpit4 күн бұрын
Hi there... Where can I get the 6 Caps you have in the MLA-2500 ?? Please let me know.
@giuseppecuffaro-13984 күн бұрын
Hello sir i got a nitro 300a with capacitor problem witch capacitor i could put in there to remplace the original one??
@keithweiss78994 күн бұрын
A nice explanation Doc.👍 I ran into something that I hadn’t thought about the other day. I got a Sonar mobile amp with 4 power output tubes. It also has a keying circuit that uses a tube. So when you hook that mobile amp to 12 volts, the big switching transistors start high frequency switching, even when you aren’t keyed. The little switching tube cannot work unless that circuit is producing high voltage for the keying tube. My ears can no longer hear them switching, but my wife put the hammer down on me!🤣 It sure is nice to have modern electronics available.
@bblod48964 күн бұрын
Ranting? no. Long winded? no. I learn every time you produce another video. Sorry you are under the weather, get well soon.
@MM0IMC4 күн бұрын
2.2uF? 🤔
@danieljohnson84375 күн бұрын
Help with voltage spikes? Small, high voltage, cap?
@KE8ODY-WV-Ares-Ham-Dad-3O45 күн бұрын
So these show pep too
@jack-on-the-air5 күн бұрын
Thanks - answered a lot of questions for me!
@rocklickranch28046 күн бұрын
I have a few of the 776’s and want to ask where you got the light brown cord? All of mine are junk. Oh and I think Motor Mouth Maul sounds like a broadcast station. Awesome sound.
@keyboarderror16 күн бұрын
That's a rare skill. Crawling through the wires and making a map.
@tramdr6 күн бұрын
Thanks
@markhowell43757 күн бұрын
Thank you for taking time to share your knowledge. I know these videos take a considerable amount of time and effort. I certainly appreciate all you do!
@tramdr6 күн бұрын
I appreciate that!
@bblod48967 күн бұрын
Cool.
@ronniewatts99877 күн бұрын
Thanks for these videos you make. Keep up the great work.
@tramdr7 күн бұрын
Thanks.
@keithweiss78997 күн бұрын
Back in the 80’s I used to design and build CB amps for fun. I built one that started as a simple 2 sweep tube amp, about 100 watts, grounded grid. From the cathode of the tube I used a regular Z-28 choke that went to a relay and then ground. But then I cut the circuit on the ground side of the choke and installed a wire wound variable resistor. I think it was about 2,500 ohms and 35 watts. With that I could totally vary the output watts of my amp. Not only that, but if I turned it down to about 25 watts output, the swing was incredible! People on the receiving end were amazed to see their S meter smoothly go up and down as I turned that resistor🤣
@tramdr7 күн бұрын
I didn't build, but I used to repair and mod in the 70's as a kid. Was doing pretty good at it too, until someone pulled out the window bars of my parents house to get to the stuff I had in the basement. People suck. Also putting the resistor in the cathode will work, but if the amp is a tetrode, put the variable resistor in the screen. That works great with amps and plate modulated radios too.
@keithweiss78993 күн бұрын
@@tramdrI totally agree Doc, people suck! (And I’m not talking about you, I’ve never met you, but you sound like a fine gentleman) I’ve been an honest guy who followed the golden rule my entire life. I’ve given and given. And, other than my Elmer, I’ve been kicked in the butt for it. My wife and I are 68 now and my wife is dying of a rare blood cancer called MDS. And most of our “friends” have suddenly turned their backs on us. Even after years of accepting our help. Yes, people suck. I doubt that I will get time to build that circuit Doc, but it makes sense. Kind of a turbocharged amp with variable power. I would think that it would be extra loud!
@michealbell50427 күн бұрын
Hi Tram Dr. Can you do mare valve radio video I really enjoy those ones and would like to see the General sb 72 mine is still not working. 🤙
@keithweiss78997 күн бұрын
Weird stuff Doc!🤣It sure is great to see someone who can draw schematics! I don’t want to brag, but I thought I was the only guy left who knew how to do that. I used to sit in the back of church and design circuits on a pad. I was sitting next to a guy one time drawing a circuit for a regulated power supply and he asked how I knew it would work? I said it has to. The design physics and math are set in stone. Next week he asked me if it worked and I said yes, exactly as figured and drawn. He just shook his head! That was back in the 70’s. Are there no young people out there today who can design and draw circuits? Please tell me if you are young and can do so. Thank you sir! You are a breath of fresh air!
@bucketofguts7 күн бұрын
Class in session. tramdr lecture.
@tramdr7 күн бұрын
Thanks
@thesquirrelchroniclesakare78087 күн бұрын
It should be a keeper after all that work ! I like it 👍🏻
@nordland22358 күн бұрын
How much is a clean diamond d201 worth...works great.
@tramdr7 күн бұрын
Clean and working around 500
@user-wc6ri2tr5q8 күн бұрын
How do you clean the metal board that they sit on?
@user-xv7yl7il3w9 күн бұрын
Ele viallr rt buenos DX en 11m Canadá
@keithford95649 күн бұрын
Yes I looked this up today Iam replacing both of my relays in my phantom putting relays with 10amp contacts mine would key up and not put out anything the meters would show current didn't won't to burn up my tubes. Lol too expensive!!
@y-vo3uj11 күн бұрын
Rocker switch
@ronniewatts998711 күн бұрын
Thanks for sharing this with us. I have never thought of this problem..
@tramdr7 күн бұрын
Happy to help
@dandee914111 күн бұрын
I have the MLA-2500 purchased new in the late 70's. It was used very little but I'm wondering other than the electrolytic capacitors how well the tubes and certain other parts have held up over the pass 46 years. I want to restore it and wondering if tubes degrade sitting around? Any tips would be great to know. Thanks Dan
@tramdr7 күн бұрын
Tubes don't degrade sitting, but the problem with the MLA-2500 was the tubes. They were usually abused 2 fold. Dentron juiced up the filament voltage in most their amps including that one. This would make the tubes put out a lot more, but of course, the tubes would last maybe a tenth of what they should. Plus, the tubes are hard to find and very expensive, plus, since most CB'ers go with the Mo watts theory, they pushed those poor tubes hard too, to get Mo watts. Hence, many people would push that amp to get 2500 watts out and quickly toast the tubes. With the tubes being hard to find and costly, some people would mod that amp to take other tubes like 4cx400's os a single 4cx800. However, a mod like that ain't easy for someone that is not an expert with tube amps.
@dandee9141Күн бұрын
@@tramdr Thanks tramdr. I will re-visit your site for a refresher before I start checking out and restoring my 2500. Purchased an Ameritron ALS-1306, too bad MFJ stopped production.
@Ed-vi6tg11 күн бұрын
I had one of them and bought it new. there is on on Ebay for $260 + 112 shipping. has I think the correct band switch knob on it. I got it for CB about 1971, I cant remember the year exactly I had all the neighbors mad at me. Caused the worst TVI ever
@tramdr7 күн бұрын
and D+A's are known to be pretty clean for a CB amp. Maco's and Varmints were known to be much dirtier.
@fredsiegfried170711 күн бұрын
do u have the wiring diagram for a courier centurien,
@tramdr7 күн бұрын
Mic wiring? www.qsl.net/g4wpw/astaticbook.pdf
@keithford956412 күн бұрын
I gotten one of these from a friend of mine didn't have a name on the front of it. The insides of it look the same yours alot cleaner. Do you have a wiring diagram for this amp I am restoring mine. Thanks 👍
@tramdr12 күн бұрын
Very cool. Sorry, no schematic or wiring though
@keithford956412 күн бұрын
@@tramdr thank you for your reply.
@ohm845812 күн бұрын
'Congrats' on the sweet meters!' Sure is nice feeling when that package comes and the seller took the time to safely pack this kind of equipment for the ride! I'm always holding my breath when unboxing Lol. Doc, Question- I'm finding myself having to use 6ft and even longer jumpers to get to certain radio's from the amp on my tables. Things seem to be okay with this.. my match changes slightly (all staying below 1.5) and of course the amp tune can be slightly different as well but again nothing too different. I just dont want to mess anything up. Whats your take on jumper lenghts from meters to amp to radio? That would be a great video topic for you to do! Really enjoy your videos and thanks for other questions you've answered of mine! Been some crazy DX lately.. im always listening for you on the air, hope to hear you on AM or SSB sometime! 73' NB160 Jackson✌
@user-cm7mn8ul9d13 күн бұрын
Hey tram doc what model is that workman meter thanks buddy hope you are doing well sir
@user-zn1wc4gz8g15 күн бұрын
What was the tubes name or what type? Thanks
@tramdr14 күн бұрын
RF Parts brand 3-500zg tubes
@SVerucci15 күн бұрын
Thats pretty cool
@tramdr14 күн бұрын
Thanks
@SVerucci14 күн бұрын
@@tramdr now I want to eventually get my hands on one of these
@michaelmontgomery169915 күн бұрын
I have a Galaxy 1000, “1feeding 4”. I also have about a 1000 tubes I got from buying a ham opener out. I want to fix it and your video is going to be useful. Thank you for taking the time to share your knowledge and talents. Wish I could talk with you.
@tramdr14 күн бұрын
Thanks
@UDX-2115 күн бұрын
Semes like a Reverse -Preamp to me. LOL
@tramdr14 күн бұрын
LOL
@foxman36216 күн бұрын
would this tuner work on 11meters and 10 meters?
@tramdr14 күн бұрын
the tuner tunes from 1.8mhz to 30mhz, which would be 10-160 meters and everything inbetween.