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Compatability
Hello fellow Drake owners. Can the TR4C be paired with any Drake receiver? In my case in particular the R4B? Sent from my T-Mobile 5G Device Get Outlook for Android<https://aka.ms/AAb9ysg>
By Ralph AD9FM · #85085 ·
Re: Supercapacitors - Possible anti-surge device to protect filaments/ heaters
They are simple and reliable. Pretty much every SMPS made has at least one. Your PC, your TV, etc. "Jim VE7RF via groups.io" <jim.thom@...> wrote: -- 73 -Jim NU0C
By Jim Shorney · #85084 ·
Re: Supercapacitors - Possible anti-surge device to protect filaments/ heaters
*** Wow, those nice die-cast boxes are expensive. I always grab'em when I find them at the flea market. - Jerry, KF6VB
By jerry-KF6VB · #85083 ·
Re: Supercapacitors - Possible anti-surge device to protect filaments/ heaters
Or just bolt a nice aluminum box from Bud Industries onto the L-4B/L-7 PSU front panel (bolt-on vertical or horizontal) and use it to trick-out your PSU: [image: image.png] *AMAZON - BUD Industries
By Jahman N5ASE · #85082 ·
Re: Help ID'ing Some Misc Flea Market Items
Barry's correct on the first one. The second one looks like a rear upper panel for a TR-4C Steve Wedge, W1ES Time flies like an arrow. Fruit flies like a banana. Sent with [Proton
By Steve Wedge, W1ES/4 · #85081 ·
Re: Another TR-3 s/n 1329
I have found a superior applicator for contact and switch cleaning: eye makeup foam applicators. They also work fine for cleaning other small mechanical items. They can be occasionally pressed into a
By Steve Wedge, W1ES/4 · #85080 ·
Re: Help ID'ing Some Misc Flea Market Items
I think that first one is the backlight lamp holder for a 4-line receiver/transmitter/transceiver(?). Barry - N4BUQ
By n4buq · #85079 ·
Help ID'ing Some Misc Flea Market Items
Some things followed me home this weekend. In addition to my TR7 parts, I got several "bonus" items. Let me know if you recognize any of these pieces, or better yet let me know if you need them. --
By Craig W8CS · #85078 ·
Re: Another TR-3 s/n 1329
" I am done for the night and will not press my luck. I have done nothing else yet, no tubes pulled / checked, no switch contacts or tube sockets sprayed with Deoxit D5." Congrats Dave, and you're
By John K5MO · #85077 ·
Re: Another TR-3 s/n 1329
Dave, when you get this running better, please let me know how it¡¯s working in 10 in tx/rx. Right now, I¡¯m working on a TR-3 and a very early TR-4 and both of them are not really all that good on
By Steve Wedge, W1ES/4 · #85076 ·
Re: TR-4 AM Mode
Randal, This is exactly what I was trying to do. I have a key in the key receptacle, no mic in the mic receptacle, and when I switch to X-AM, the audio goes dead. To me, that doesn't seem correct and,
By n4buq · #85075 ·
Re: TR-4 AM Mode
Mike, Thanks for the explanations below. In my case, I have a key inserted in key jack so switching to X-AM would only transmit with the key down (I don't have a microphone inserted - yet). With it
By n4buq · #85074 ·
Re: TR-4 AM Mode
Having just listened a bit to some AM on my TR-4, ?and having read Mike's comment, I'll point out that the manual indicates that you can receive AM in the X-AM function switch position. ? I have a
By Randall K8BUX · #85073 ·
Re: Supercapacitors - Possible anti-surge device to protect filaments/ heaters
That would work too...... but they have to be sized correctly.? ?They run hot, and have to stay hot.? ?IE:? no forced air on them, or their resistance will increase. The op did not tell us what
By Jim VE7RF · #85072 ·
Re: TR-4 AM Mode
Barry, To receive AM with the TR4 the Function switch must be set to "SSB" not "X-AM". Setting the Function switch to "X-AM" will key up the transmitter, disabling the receiver. Operating AM with the
By Mike W5RKL · #85071 ·
TR-4 AM Mode
On my TR-4, when I switch to AM mode I get no audio output at all. Can someone please suggest a way to troubleshoot this? I thought that if I touched the grid of the last audio amplifier with a
By n4buq · #85070 ·
Re: Another TR-3 s/n 1329
Thanks for the suggestions guys. There was no jumper on the RV3 VFO socket. I have installed a 8 pin plug with pins 2 & 8 jumpered. It is amazing what happens when something is connected properly!
By Dave Stepnowski KC3AM · #85069 ·
Re: Supercapacitors - Possible anti-surge device to protect filaments/ heaters
Or a NTC surge limiter in the AC mains side of the power supply. "Jim VE7RF via groups.io" <jim.thom@...> wrote: -- 73 -Jim NU0C
By Jim Shorney · #85068 ·
Re: Supercapacitors - Possible anti-surge device to protect filaments/ heaters
As a side note, not all step-start controls are really what one would want. ?One particular model (still in inventories) is no longer made and is not a step-start even though it is advertised as
By Evan · #85067 ·
Re: Supercapacitors - Possible anti-surge device to protect filaments/ heaters
Wasted effort.? ?You would be better off to do any surge limiting with an outboard step start circuit.? ?Like a 20 ohm resistor in the hot leg? of the incoming mains.? ?Then shunt it after 2-3
By Jim VE7RF · #85066 ·