I just got one of the VHF amplifiers that pairs to the civil defense gonsa communicator. Do you have any literature on this amplifier or can you direct me where to get literature? I can't find anything anywhere
is the clicking when keying your paddle from the paddle, or from a relay in the amp? I've got one of these for 2m band that I picked up at stone mountain some years ago, unfortunately haven't had time to do anything with it. I was wondering if it would also work on other bands, but I imagine it needs a different tuning coil for that?
Jon, It's from the relay in the amp. I would not know how to convert it. The amp is made to pair with a Gonset transceiver. I have since sold the unit, since I could not make it work for me. I bought it to save it from the scrap heap. Thanks for viewing! 73 Paul AA1SU
@@vtradio thanks for saving it from the scrap heap! I guess I'll have to look around and find a second amp on a scrap heap somewhere :) I imagine the main difference is the big tuning coil, and whatever capacitor it's in resonance with.
@@vtradio part of why I was asking, was that the relay may get worn out quickly from doing CW with it. I'm interested in learning code, and looking at possibilities for simple rigs to use. I'm guessing I'll have to build something, which is more than half the fun :)
Select at OFF should work and will be LOUDER then 1, 2 or 3 on Select.. Adjust the variable CAP on TOP of the select box for best hiss and output when the Crystal Phasing is level. The eelect knob is really 3 powers of degrees of NOTCH Depth and the Phasing is the NOTCH. The IF knob is the bandwidth. Source: I have one of these NC-300's.
Thanks for the ideas. I will try them out when I get a chance. I've been trying to sell this at a local Hamfest w/o any luck. However, now I'm going to keep it for a vintage AM station because someone wants to buy my Hallicrafters SX-101A that I was saving for that purpose. 73 Paul AA1SU
I have the NC-300 and recently sold a NC-303 with matching speaker. I want to sell the NC-300, but not having much luck at the same Hamfest where I sold the NC-303. I have a really nice Hallicrafters SX-101A that I am keeping for the vintage AM station that I promised myself I would put together a few years ago. I have videos of all 3 here on RU-vid. Check then out when you get a chance.
Nice succinct but informative video -thanks indeed for posting. I do have a very strong suggestion: you REMOVE the SELENIUM RECTIFIER and replace it with a modern electrical equivalent. When they fail, selenium rectifiers produce *EXTREMELY* TOXIC VAPORS. It’s just not worth taking the chance.
I did not know this had a selenium rectifier. I made no repairs or mods to it. Soon after this video, I sold it on eBay. I rescued it from the estate of a Silent Key. He was a ham radio hoarder. I bought as much stuff as I could before the house was sold. I went by the house a few months ago, and it had been completely renovated. I knocked on the door to find out what happened to what was left behind, but no one was home. However, I and some others saved as much ham radio history as we could over a 2 year period. Thanks for watching and writing. 73 Paul AA1SU
Actually, I sold it to Todd Bigelow KA1KAQ. He used to live here in New England but now lives in VA. I think it sold for $75. I was glad to see it go to a good home. He said that he had one already, but that mine looked in better shape, so he planned to use that one. Have not followed up, though.
Milliwatts of grid? Mine use milliamps. Milliwatts of plate "current? Isn't current measured in amps? The DX-20 specifications call for 50 watts input and you get 40 watts output? Really, 80% efficient? New record. Your meter read milliwatts on lower bands and milliamps on higher bands, novel. Why did you replace parts?
Aha! Good catch. I did not grow up with these, like you did. You can correct my mistakes when you make a video of it. I actually made the video clips in Sept 2022. Just got around to uploading it. I replaced 3 capacitors and 3 resistors, using the Hayseed Hamfest kit. When I first got it, I thought something was wrong because it would not transmit w/o the key. But after I replaced the components, it still did not TX. Then, one day it suddenly did. You said that I probably bumped something that fixed it. I also replaced the resistor in the parasitic choke because it broke apart on me. That may have also taken out the 6DQ6A tube because I replaced that, too. 73 Paul AA1SU
@@vtradio Do you go around replacing light bulbs that might go out? I had a capacitor in a S-76 receiver blow up and belch smoke and then stop and the receiver now works fine.
WHAT IS SO GREAT ABOUT CB,HAM,CW. OLD JUNKY RADIOS WHERE CANT HALF UNDERSTAND THE OTHER PARTY HELL,JUST BUY YOURSELF A SMART PHONE AND GOOGLE WILL LET YOU TALK ALL OVER THE WORLD CLEARLY CHEEPER AND WHEN YOU LIKE
I take it that the coax jack on the back was a modification? I can see replacing the heating element with a resister, that's basically what a heating element is. The resistance creates the heat.
Pat, Actually, the coax connector is factory installed. I probably won't add the resistor, but who knows, I might. I've decided to keep the radio in case ever get around to building my vintage station. I had planned on using my Hallicrafters SX-42, but the SX-101A is Ham Band only and would probably be a better choice. 73 Paul AA1SU
On/Off button is still a mystery to me. I did not hear about NEAR-Fest, so I just went to the web site. I see that it is Friday only and ends at 3 PM. I'm horrified! I'm glad that you mentioned it to me. Thank you.
I just bought Zenith Transoceanic B-600 off of eBay. BC AM works great but it is not receiving anything on SW - just buzzing noise. What do i need to check to troubleshoot SW reception? Also, is it possible to connect an external antenna to this radio?
The fact that you are receiving the AM Broadcast Band is a very good sign. What I would do for starters is to go to a room, away from computers (or outside), and extend the wave rod (antenna) all the way up. If it's daytime, alternate between the top 4 bands and tune around the dial slowly. If it's nighttime, try the bottom two bands. You should be able to tune something in. Yes, this radio will accept an external antenna. Open up the back and you will see two screws near the bottom of the wave rod. You can attach a long wire to the one marked 'A'. The other one is marked 'G' for ground. Don't worry too much about that one. If you want to see the video series that I did on restoring this radio, go to my channel and click on Playlists. It will probably be more that you want to get in to, but it may give you some ideas of what to look for. If you know someone with a tube tester, you may want to start by checking those (baby steps). Installing the Filt-R-Pak from eBay would be a plus, too. I just checked and the seller is running low on stock. I need to order one each for my 8G005 and my H500. Good Luck and keep me posted. 73 Paul AA1SU
@vtradio Thank you for your suggestions, Sir. Here's my setup. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-TwdrXaBCZJE.htmlsi=9badqcOiyo9E5CTB The SW now works great with my external Hustler HF all band vertical. 31-meter band is my favorite and, of course, it is best to listen to it at night. Here, in California, I am able to pick up Radio España daily on 9.690 MHz starting around 22:00 UTC (around 2 PM Pacific). And, yes, the radio hates all modern electronics and LED lighting, so I had to setup a normal incandescent lighting in my bedroom because I love falling asleep while listening to a SW broadcast with a little bit of static noise. Although, I don't speak any other languages besides English and my native Russian, I still enjoy listening to broadcasts no matter what language they are in. I am a bit disappointed about the lack of European stations that can be heard on SW bands at my QTH but there is a station from. Miami that broadcasts European radio shows. 73!
This is a video that needs to be pulled down. It was a parts radio with worthwhile mods at some point. Otherwise I hope this Op has learned more since this was posted 5 years ago.
Thanks for showing these resistors. I'm guessing they're 1/2 watt resistors, correct? I would be curious what the actual ohm reading is of the original resistors and how close they were to the stated value.
You can do some sort of internal grounding trick to keep the thing from spewing out harmonics on higher HF frequencies and possibly 6 meters. Otherwise the Knight (T-) 50 is a simple MOPA CW transmitter, and I've heard people really like them.
I have one of these too. Tone board yes but no preamp. Is there a way to remove the memory entries? I can only reach less than 10 repeaters in the area and would like to remove the others from my old location. Thanks for the intro! It was really good.
I don't have the radio anymore. I would think that there would be a way to remove the memories. If not, you can add popular simplex frequencies in there. Thanks for the kind words, too. 73 Paul AA1SU
You have something not set correctly, perhaps horizontal gain. On AM, the one AM signal covers the whole display. assuming that AM signal is about 10 kHz, the 100 kHz width that the scope provides should show signals to the left and right of the signal. Same for SSB, where you have that 3 kHz signal covering the whole scope display. In this configuration it is useless to look at a portion of the spectrum for activity, since any signal covers the whole scope display.
Steve, I agree. In part 2, I changed the settings quite a bit, and it was more pleasurable to use. I was not used to it yet, and I jumped right into making the video. 73 Paul AA1SU
Thanks. I got mine in an estate sale, too. I couldn't really find a use for it here. A friend wanted it, so he traded me a non-working 1939 Hallicrafters S-20 Sky Champion Shortwave Receiver. Not sure who got the better deal. 😉😉 73 Paul AA1SU
This was my first receiver and and and seeing this brings back many memories. I have one and realy want to bring it back to life. I have an ICF-2010 Sony but something about tube receivers is special. Thanks for the video.
Eddie, I really like the tube receivers, too. I also have a Sony ICF-2010 but I haven't really listened to it since I bought it last year. As for the S-120, I sold it soon after Part 2 came out. I sold it a Hamfest to a nice older couple that looked at it one day one, thought about it overnight, and came back to buy it on day two. I'm glad it went to a nice home. 73 Paul AA1SU
Excellent presentation! Thanks for sharing. A couple of questions. First can a modern headphone with ¼" adapter be used with your R600? And second, how well do the tone controls work in adjusting the tone?
Yes, I believe that a modern headphone will work just fine with a stereo to mono adapter. I have not played with the tone controls too much. As I recall, they make a difference, but not a whole lot. Thanks for the question. 73 Paul AA1SU
@@vtradio Subtle differences in tone is what seems to be the common response... I'm asking because I can't hear any difference at all with my ZTO R600. The tone is fine as it is, but I'd like to get those tone switches working. Thanks for responding... 73
Bob, I forget exactly where, but this link looks like the exact thing that I used: bama.edebris.com/manuals/zenith/l600 It's for the L600, but there were very few differences in the 600 line. 73 Paul AA1SU
I made an email request for a quote on just the caps w/o the can capacitor. He replied right away. It turned out that I did not need the single electrolytic capacitor. I have since misplaced it. Bummer, because I have other T-Os that would benefit from it. Thanks for your comment. 73 Paul AA1SU
@@vtradio I sent the radio to TOMS OLD RADIOS in Texas. He restores these radios and will replace whatever is necessary to repair. TOMS OLD RADIOS is the company that makes the Filt R Pak power supply
My luck with a similar Zenith model is the dam radio is deaf on all bands. Everyone else has radio luck and their radio works without an antenna..........DAM!!!
Thanks for watching and thanks for the comment. It does look hard, doesn't it? I would have to watch it again before attempting it on another radio, which I plan to do. How's that Globe Scout coming along?
@@K1OIK Thanks. I will admit that I was terrified to this, or the caps for many years. I left it up to a guy that I met at NEAR-Fest to do it for me. In the end, I replaced more capacitors than he did. I have since sold this R600 but kept my first one. 73 Paul AA1SU
I sold this to a local ham soon after making this video. He already had one and was looking for another. I recently found a cart to hold my Hammarlund SP-200, so now I am finally enjoying that one. The SP-200 has a separate power supply, so setting up that one can be a challenge. I hope to make a video of that one soon. 73 Paul AA1SU
141-142v on B+ seems a little high. The schematic I have has the B+ at 130v, with 120v and 110v further down the voltage divider. I just got a S-120 to recap/rebuild with that Hayseed Hamfest kit. Your two videos are great tutorial and will be very helpful. I think your highlighted 150v on the schematic is for the capacitor rating.
Thank you for the comment. It could be that I was looking at the wrong part of the schematic. All the other research showed a resistor to bring down the voltage. I sold it at a Hamfest soon after this to a nice older couple. I could have sold it for more on eBay, but I'm happy that it went to a good home.
Some beautiful radios. I wish we had something like this around here in Yonkers, NY. Thank you for sharing this. I enjoyed watching this video. Have a good day Paul.
yes thank you. Having worked on corvettes for over 45 years its sometimes years between each task. So it was very good to have this video to reference for my latest project - LS3 conversion of a 69.
