#208

[@TRXLab]

To all my You Tube friends Thank you very much for your warm and empathic welcome! I really feel very much honoured by you our YT community. First of all I'm fine and as well my family. The reason why I can not post new videos on a regular basis is simply due to extremely limited time. We all need to do business for our living and YT is only a hobby. I do not earn money on YT and I don't want to even in the future. And to be honest I never would earn money on YT to make a living out of it due to my bad English as a matter of fact. But I love to give a bit enthusiasm to the radio community for the fascinating radio engineering. Therefore I stay posting in English even it is not good. But that way we can reach the world. If I earn an nice feed back as I always got from you all my dear YT friend it is more than I want. So I have to apologize that I need to concentrate to pay my bills first to feed my family... Nevertheless I try to post videos when ever I can. Hope you will still support me in the fantastic way you did in the past. Stay safe and healthy even in this crazy times. All the best from Peter 73's

[@johntyson8932]

Nothing wrong with your English, mate.

[@prabhupillai9386]

Dear Peter... We love your English.. That is known as Peter English.. We from Asia are more comfortable with your English than from concentrated English.. Keep going.. Take your own time.. We will wait for you... ❤❤❤

[@rickkennard8027]

You English is just fine. Can certainly understand needing to earn money to support your family. Glad to hear all is ok. I think some of us were worried. Anyway as long as you post I will support it. Your videos are really educational. In fact I've gotten back into repairs because of you. We will be here to watch when you are able to post. Take care and stay safe in this crazy world we have right now.

[@Manawyrm]

Hey Peter, have you though about setting up a Patreon account? I really do enjoy your videos and would really love to see more of them and support you in making them via a regular donation. I'm very sure many other people see this the same way.

[@brettvk4bde]

Hey Peter no need to explain buddy just glad your back making videos when you can. Your English is just fine. 73's to you and your family

[@earlrichardet2102]

Welcome back Peter. It is getting late this evening so I won’t have a chance to watch your new video until tomorrow morning, but I just wanted to say that is is so good to hear your voice. You have been missed!! Thank You!, Earl VE7QJ

[@felixperezjrATgmail]

Glad to see you back!

[@TinTin-dr6ls]

It feels so good to hear your voice again !

[@DonDegidio]

Hi Peter, Good to see a video. I had wondered if you meet with an accident. The video has very good information. I have a Heathkit SB220 amplifier and installed the Harbach Electronics Soft-Key Keying Interface to use with my Yaesu FT-450. I have upgraded my license to Extra and changed my call from WB3BJU to WJ3U. You and your family stay safe.

[@TRXLab]

All is fine thank you Don! 73

[@TheMaddogronh]

We couldn't ask for a better Holiday gift than to see you back and in good health !!!! I had to make something like this to use my FT857 and FT450 to use my FL2100.,, Nice video..

[@TRXLab]

Thank you Ron!

[@johnbellas490]

Peter it is good to see you back and O.K. with what is going on in the world today!! I am so happy!! Good point in this video !! Thanks!! John Bellas KC2UVN 73's see you soon!!

[@TRXLab]

Thank you John!73

[@justinshears879]

What a great thing to find, a notification on my phone saying Peters Back!!!. As usual a interesting video always learn something from the Master. Welcome Back Peter if it's only for a brief visit have a super Christmas if you can. 73's from me take care.

[@TRXLab]

Thanks Justin, see my info at the top! 73

[@M0UAW_IO83]

Lovely to see you're well and making videos. I've repaired a couple of radios that were quite badly damaged by older amps, fortuantely I don't see it often as the older valve amps don't seem to be that common but I suspect that would make it more likely that people wouldn't know about the possibility of damage.

[@TRXLab]

Thanks Clint

[@M0RMY]

Peter it’s so good to see you upload again. Thanks as usual for an informative and helpful video. 👍

[@CT1JRZ]

Nice to see that you are back with new videos.

[@MrPerrey]

Thanks Peter for coming back again with a new video. For me Your chanel is one of the best and of cause, funny too!!

[@TRXLab]

Thanks Wolfram good to hear! All the best 73

[@StuartM0TTQAmateurRadio]

Welcome back. I didn't realise there was so much power going through the switching line so this has been very instructive!

[@TRXLab]

Thanks for feed back

[@ThomasHart59]

I was just wondering if I’d been missing your videos, so I looked around and found none. So glad to see a new video from you Peter!

[@TRXLab]

Thank you

[@danluzurriaga6035]

I use an ARB-704 to isolate the radio PTT sent from my Ameritron AL80B key input. I don't think the coild voltage is that high BUT the relay coil kickback can damage the radio PTT send. You see, I have used my Yaesu 747 (I know you have one of those Peter), a Yaesu FT-950 and now a Yaesu FTDX3000. In all cases, I believe a transistor is used to ground the amp's relay coil. If I am not mistaken, I think the amp's coil voltage is 10v (or maybe 16v?). And the current is just a few milliamps and most modern transceivers can handle it. The problem is, the inductive surge of turning on/off the relay coil. If fact, sometimes the diodes on those snubber circuits fail open and you never know that happened. So Ameritron markets the ARB-704 for those who want to play it safe and it is a bit more complex than your single transistor circuit but it is basically the same principle where the output transistor on the radio sources a larger external transistor to absorb the 1) diode kickback and 2) is also rated at 120V DC or so for the older amps like the Kenwood in your video. I am most familiar with Yaesu and for all I know, the other brands of radios use small relays as you mention, rather than transistors for grounding the amp relay circuits. Another thing is the ALC connection between radio and amp; of course older amps need adjusting. I think Yaesu rigs use -4v (or-5v) as maximum ALC voltage and Ameritron can source -10v. That may or may not be enough to damage the ALC in the radio but it may have damaged my FT-950 ALC. My AL80B is older and does not have the 5K pot to adjust ALC voltage so I built my own. However, I may not have set it correctly. My FT=050 finals did eventually die for some reason (after 12 years) and that is the only thing I can think of that may have caused it. My max ALC coming from the AMP may have been around 10v to the radio. Anyway, thanks MUCH for your videos and GLAD to see you are back again. I look forward to more of your material, by far the most professional and instructive I have seen on radio repair! BTW I will not use the AL80B AMP with my FTDX3000 (similar PA stage is FT-950) until I have this figured out. I did replace the finals on the 950 and all is well with that now but I do not want to use the amp with that one either!

[@TRXLab]

Thanks for your feed back for our community 73

[@TheBrforsberg]

Glad to see you back Peter and nice video.

[@dennisqwertyuiop]

thank god your ok, been worried about you long time no see,missed your videos,the best

[@TRXLab]

Thanks Dennis, all is fine! 73

[@jacksat2252]

Hi, man i missed you and your videos. I had to check the date of this video to confirm if this was a new one and not an old one i missed. Good to see and hear from you again. 👍😄

[@TRXLab]

Thank you

[@braamdevenier7930]

Nice to see you are back.

[@mike-M0MSN]

Welcome back Peter, I like many others have missed your uploads. Great to see this upload.👍👍

[@Radiocruncher]

Great to see you back Peter. I’ve missed you and your videos a lot as have most of our community. Nice little device you have made. I’m sure it will save a lot of repair bills for people and looks nice and easy to build. All the best Graham👍🏻

[@TRXLab]

Thanks for feed back Graham!! All the best Peter

[@johntyson8932]

Excellent topic and great to see you uploading again.

[@TRXLab]

Thanks for feed back John 73

[@Werlaf]

Hi neighbor, I’m happy to cu back on the channel. Also nice to see my old 857 back in action.😂

[@TRXLab]

yes 857 was still working but now hm it's over.. haha only kidding

[@casalambretta]

Wonderful to see you again Peter with a simple solution for such a beautiful amplifier.

[@davidniemi4051]

Glad to hear you back allowing us to learn more from you. THANK YOU :)

[@s7courier]

Great to see and hear you again. You have truly been missed. Hope all is well.

[@undeaddave]

Welcome Back Peter. Hope you and the family are well.

[@TRXLab]

Thank you all is fine 73

[@michaeldotc2254]

Wonderful to see you again Peter! Love your videos. This one really helps me connect my old tube amp to my Yaesu FT-847. Thanks Peter!

[@jimwolsiffer4397]

Hi Peter, Thank you so much for what you share. Glad all is well and look forward to what you post as you can. 73, Jim WB8ZLK.

[@OrbiterElectronics]

Good to see you again Peter my friend, hope all is going well with you. Thank you for the informative video. Regards John

[@TRXLab]

Good to hear from you my friend! All the best Peter

[@paul-c7541]

Peter so nice to hear you again, and with a project, hope you and yours are keeping well in these crazy times 73, Paul de M0BSW

[@enigmarbs2886]

Glad you're back on your channel, Peter. I have had missed your interesting videos. 73's de Stefan

[@TRXLab]

Thanks Stefan 73

[@Captain-ku2rm]

I enjoy your videos very much! Please keep posting your great contributions on You Tube whenever your spare time permits, while also tending to family oobligations, and earning a living. By the way, your English is superb, and we enjoy your slight accent very much!

[@TRXLab]

Thanks for feed back

[@ojjenkins7110]

Man I'm glad to see you are still alive Peter. I wish my German was as good as your English. Merry Christmas. The HF portion of the TS2000X is relay switched, 6M and up is solid state. Thanks for coming back.

[@TRXLab]

Thanks OJ !

[@Darryl603]

So glad you're okay! I was worried about you! Happy Holidays and Be Safe!

[@TRXLab]

Thanks Darryl, all fine here 73

[@michael_pa4mic]

Good to see an new video from you Peter! Cannot wait for the next one 😀 All the best from Netherlands.

[@MrSuperheterodyne]

Nice to see you again Peter! I was thinking about your videos today as I was driving to work, and here we are, when I get home, a new video! Fantastic!

[@jeffminnick5209]

Glad to see you are ok... I have really missed your videos Peter, and your English is just fine no worries there my friend !! Understand the need to make a living to be sure but still nice to see you again May you and your family have a blessed upcoming holiday season and throw us a video when you can, it Was great to see this one Stay well and i look forward to seeing more or perhaps hearing you in the bands with thensun waking up 73 my friend from Jeff de WD8JM

[@Russ-]

welcome back sir really good to see you again.

[@worroSfOretsevraH]

You will not believe the look on my face when I saw the youtube notification. A new TRX Bench video? No way. Welcome back. 73.

[@glynnhm0lsg308]

Me to

[@TRXLab]

Thanks you!

[@brianst.pierre6566]

Peter, it’s good to see you again. Just keep making videos when you can and we’ll watch them. Your accent is part of you and part of what people like about your videos. Thanks again.

[@kg2ix]

So good to hear your voice again Peter. I missed you very much. Just knowing you're OK is an early Christmas present. 73, Keith

[@TRXLab]

Thank you Keith 73

[@rickkennard8027]

Wow Peter what a great gift to see you back online. I hope you can start posting again. I've missed your video so much!

[@Don.Steve.]

Peter thank you for taking the time to make these videos and pass along the knowledge. I live the way you go over every step and make it understandable. You English is great and better than some people I know that English is their only language. Family comes first and that includes being able to provide for them financially. You have the best videos on radio repair. I hope you consider a way for people to help you with Patreon or other process.

[@TRXLab]

Thank you!

[@ianxfs]

Brilliant fix! Welcome back 👍🏻

[@WR5RR]

Good to see you back and all is good with you. Yes making videos is time consuming. Many thanks!

[@NinoSaelectronics]

Bentornato mio caro Amico e Maestro ... I am very happy that you are back to YT and especially in the family everything is ok, I have been following you from Italy specifically from Sicily for a long time and in these years you have learned me a lot of things .. I would like to tell you that your English is excellent and I understand you perfectly, one hundred percent , of course I understand that family and work come first and then everything else ... Thank you for coming back my dear Teacher Peter .. Ciao . Thank you de IT9ETX .

[@TRXLab]

Thanks for the very kind words my friend. My best wishes over to Sicily and stay safe. Ciao

[@SoddingaboutSi]

Your still alive! Great to see you Peter. Stay safe.

[@TRXLab]

All fine Simon! Thanks for stepping by

[@dalebarnes2737]

Welcome back Peter, it's nice to have you back, we enjoy your channel, from a fellow ham.

[@ZenwizardStudios]

Peter Welcome back and glad to see and hear you are doing well! Thank you for all the wonderful information you have shared over the years, I look forward to all your videos when you have time.

[@ramaoktawiyagi8083]

Welcome back,glad to see you again

[@05055785]

Thank you Peter for coming back. I really appreciate your knowledge, I learned a lot from You. Thank you very much and I look forward to the next movies.

[@andybonneau9209]

Nice topic. Good to hear from you.

[@TRXLab]

Thanks for feed back Andy 73

[@GiorgioFirpo_IU1BKT]

Happy, very happy to see you again Peter. Wellcome back ....

[@mymessylab]

Interesting topic. Nice to see you back 🤗

[@chrisj0]

Wow, great to see you back Peter! I've been thinking about you recently and watching all your old videos. This is a great tip and an interesting circuit you designed. Thanks and I hope all has been well during your absence.

[@TRXLab]

Thanks Chris all is fine.

[@chickennugget3362]

Great to see you back! Hope you have a great Christmas! 73's

[@michaelfuchs1467]

Long time no see... Welcome back to YT Peter! I think many agree with me when saying that I missed your videos.

[@MikeandMarilynWarren]

Peter, glad to see you back on KZbin. We all missed you! With all that is going on right now with COVID and all, I wouldn't expect anything less than family first from you. Don't stay away as long this time. BTW, your English is just fine! Now my German, that's another thing altogether. Guten abend.

[@seanregan730]

So pleased your back Peter and yet again another great video. As wooroSfOretsevraH put it the notification that you'd posted a new video was day topping moment. stay safe and all the best to you and yours Best Regards Sean

[@glenwoofit]

That's an eye opener, such a high voltage and current. Glad to see you making videos again.

[@TRXLab]

Thanks for feed back

[@tedfrisk4730]

Welcome back dear Peter we rely have miss you world wide, Happy to see you again 73 de SM4PDP

[@jimgiordano8218]

Great to see you Peter. I hope all is well and we will see you again. I miss your trouble shooting and repairs. This is much cheaper than buying one, simple circuit, easy to build. Welcome home, you have been missed. Jim

[@TRXLab]

Thanks Jim!

[@Mrjm5411]

Peter so good to here you once again. Thank you for all you have contributed.

[@TRXLab]

Thanks you

[@nanko55]

Thanks a lot Peter for returning and all your nice video’s in the past, hope you can continue this in the future. I learned a lot from your CMC Attenuation and Balun video’s! Great help for better understanding our nice hobby. Regards, Nanko, PA0NVY

[@TRXLab]

Thank you Nanko

[@michaelclutton8446]

Great to see you back Peter, have missed your excellent videos

[@TRXLab]

Thanks Michael

[@8du]

Quite a Birthday treat Peter ! So nice to hear your voice & knowledge cross my speakers again. 73 Roger

[@bobkozlarekwa2sqq59]

So glad to have you back, you’ve been missed!

[@baghdadiabdellatif1581]

Welcome back peter. We missed you. That circuit do soft starter

[@AntiqueRadioandTV]

I can't express to you how much I miss your eloquent and informative videos. I have learned so much about ham radio engineering from you. I have been asking everyone; :Where's Peter?". "Where's Peter?". Now you're back! I do have a Icom 7300, so the information here is definitely pertinent to my situation here. Thanks! Glad to hear everything is well with you and your family. The last time we heard from you, the world was a totally different place. Crazy times today. Be safe my friend. Tom 73's

[@TRXLab]

Thanks for the kind words Tom!

[@skater4169]

Good to see you back Peter and I understand family should always come first and the hobby second and looking forward to many more interesting videos.

[@TRXLab]

thanks for stepping in

[@HaroldSnure]

Welcome back. Missed your informative well thought out videos. Please make more.

[@M7XCB]

Glad to seeing you again and your OK and made more video you have been missed by lots of people.

[@AndreTauros]

Welcome back Peter, we miss your videos, best 73 de PU1PYZ from brasil

[@berndb.5097]

I am very happy to see (hear) you again.That was an excellent subject.Thank you and mny 73 Bernd

[@TRXLab]

Danke Bernd!

[@gingertruth2841]

As always, an excellent video. Welcome back.

[@happymark1805]

I always used an external extra relais between it, but in FM/CW that can give a problem because of the extra switching time, TRX is switching full to power while the relais in the amp still is in rx.

[@jim-cm2qp]

Great subject, this is becoming a very popular discussion, with all the new radios being so affordable, they are very popular, which also means people are using the older amps because they are so robust and also affordable, keep up the great videos Peter, very educational. !!!!!!

[@bundylovess]

Good to hear from you peter hope your doing good 73

[@jamessawyer4625]

good to see you back on the bench via you tube. I hope you can keep content to us. its always good.

[@geofham8332]

Fantastic to see you again Peter!!!

[@Michigan_Tactical]

Good to see you back!

[@grantfullen9559]

Peter so glad you are back even if it is not often as it use to be.

[@TRXLab]

Thanks Grant

[@PapasDino]

Wonderful to have you back Peter...you've been truly missed! Some of the newer radios (IC-7600, IC-7851 etc.) have the option for MOSFET switching that is menu selectable...the MOSFET can handle the higher voltages, in my case the 7851 can handle 250V/200mA with that function selected. You still have to be very careful as the default setting in that radio for PA switching is only 16V/0.5A. Great topic Peter, thanks! 73 - Dino KLØS

[@TRXLab]

Thanks for feed back Dino! All the best 73

[@timtimeprojects3576]

Peter, I've been waiting for a new posting from you. Your English is fine, and the way you are able to explain things in a different language is admirable. It makes me feel below standard that I only speak and understand one language. I agree that work comes first, so produce a video whenever you can. Tim

[@TRXLab]

thanks for the kind words, Tim

[@Ralph-tHein]

Hallo Peter, mit großer Freude stelle ich Heute fest, das Du nach langer Zeit wieder aktiv bist !!!! Ich habe mir schon Sorgen gemacht !!! Ich hoffe, es geht Dir gut und man sieht wieder mehr Videobeiträge von Dir ?? Habe Deine Beiträge, von höher fachlicher Kompetenz sehr vermisst!! Ich wünsche Dir und Deiner Familie eine schöne Vorweihnachtszeit trotz Corona und bleibt vor Allem gesund und passt auf Euch auf. Beste Grüße 73 de Ralph DB9FQ C31KM

[@TRXLab]

Vielen Dank Ralph hier ist alles okay. Wichtig ist das wir in dieser verrückten Zeit alle gesund bleiben. Videos möchte ich gerne ständig machen, aber wie in der Info hier ganz oben beschrieben ist meine Zeit sehr limitiert..., aber so oft es geht werde ich posten.Auch Dir und deiner Familie eine schöne Vorweihnachtszeit und danke fürs vorbeischauen. 73

[@Joe-KN4IFI]

Welcome back Peter. We all missed you and are glad to see you well. Stay Safe. 73 Joe

[@aslerunarborgersen5175]

Hi Peter and welcome back. so nice to see another TRX Bench video again. We really missed you, and we also started to worry something may have happened to you when you suddenly disappeared, even if your neighbour told us you are ok. Take care, and stay safe. 73 LB5JG Asle

[@TRXLab]

Thanks you! Yeah my friend and neighbour is always right... lol 73

[@coltronex]

Your English supersedes my ability to speak German,keep up the good work Peter!

[@NotGonnaSayFO]

VERY glad to have you back!

[@misseryguts]

Good to see you back on YT, I have missed your interesting posts.

[@EricHerd]

Welcome back, you have been missed!!!!

[@wobboonstra9290]

Good to see you again

[@Alberto_Alletto]

Welcome back! You are my idol !!!!

[@Manawyrm]

It was very nice to see a new video from you! Very interesting problem, haven't thought about that. 73 de DL4TMA!

[@TRXLab]

Danke Tobias!

[@MrKelendros]

A wonderful surprise to see a notification of a new video from you Peter!!!. I have being reviewing all your previous videos meanwhile. Really glad to see you again back my friend 😀😀

[@TRXLab]

Thank you

[@jimedahl]

He’s back!

[@wb8vqv]

Great to see you back with us Peter. I was having withdraw symptoms. I've learned a lot from your videos over the years. Thanks, Dave, WB8VQV

[@TRXLab]

Thanks Dave! 73

[@caulktel]

Its so nice to see your new video Peter, I was worried that something was wrong so Im glad you are okay. I think your English is fine and look forward to any videos you have time to make for us. 73 OM

[@TRXLab]

Thanks Joel 73

[@BobMellor1954]

Hi Peter, your videos are always informative and your English is much better than my Deutsch. Hoping you and your family Stay safe 73's

[@TRXLab]

Thanks Bob very kind! Yes hope we all stay safe in this crazy time. 73