开云体育

T-4XC Meter Shunt Resistor?

Craig W8CS All Messages By This Member #84231 I'm looking to replace the 3.3ohm meter shunt resistor in the cathode circuit of my T-4XC.? ? Is the circled resistor the right one?? -- Craig/W8CS Greenville, SC shunt.jpg
Dan All Messages By This Member #84235 开云体育 Yes. Dan WB4GRA toggle quoted message Show quoted text On Apr 7, 2025, at 8:04?PM, Craig W8CS via groups.io <craig_severson@...> wrote: ? I'm looking to replace the 3.3ohm meter shunt resistor in the cathode circuit of my T-4XC.? ? Is the circled resistor the right one?? -- Craig/W8CS Greenville, SC <shunt.jpg>
VE7PS All Messages By This Member #84244 Totally agree with Dan on R59, the 3.3 ohm shunt resistor. That resistor...and R49, the 2w 1.5K ohm resistor on the 250V line just above it, are often found heat damaged in the T-4XC, and I usually change them whenever a T-4XC comes my way....just because.? Your R49 looks slightly bulged around the middle to me in?your pic.? ?Check it at the very least. 73 Peter VE7PS toggle quoted message Show quoted text On Mon, Apr 7, 2025 at 5:40?PM Dan via <pitfit=[email protected]> wrote: Yes. Dan WB4GRA On Apr 7, 2025, at 8:04?PM, Craig W8CS via <craig_severson=[email protected]> wrote: ? I'm looking to replace the 3.3ohm meter shunt resistor in the cathode circuit of my T-4XC.? ? Is the circled resistor the right one?? -- Craig/W8CS Greenville, SC <shunt.jpg>
Craig W8CS All Messages By This Member #84247 Thanks Dan & Peter! ? R49 came in at around 1600 ohms, replacing tomorrow. Surprisingly, Amazon has them but you have to buy in bulk. I just received the unusual message after my order,? "Your order for 10PCS 1.5K Ohm Resistor from FOCMKEAS has been confirmed" Can't wait to read the review comments with a vendor name like that.? ? I'm replacing the 3.3 ohm with a precision 1% and I'm going to run leads from it to banana jacks that I'm installing in the extra holes next to the cinch jones connector.? ? At 60mA bias I should read a drop of .198V across the jacks. With that funky non-zero meter in the T-4, I wonder what the actual bias is that I'm currently running.? ? Hopefully the extra wire length won't create any parasitic hooligans.? -- Craig/W8CS Greenville, SC
Gary WB6OGD All Messages By This Member #84258 On Tue, Apr 8, 2025 at 03:17 AM, Craig W8CS wrote: Hopefully the extra wire length won't create any parasitic hooligans.? ? ? A better place might be in the power supply like Drake did in one version of the AC-3 supply. See attached. ? 73, Gary WB6OGD ? AC3.jpg
Craig KL7H All Messages By This Member #84279 开云体育 ? ? ?Roger on the FOCMKEAS Amazon vendor below.? I have one better than that.? A while back, all of us standby passengers were staring at the priority monitor display at an Alaska Airlines gate.? The rank order of standby passengers is listed by the first three letters of the (hopeful) passenger's last name with a space followed by the first initial of his or her first name. ? ? ?As a Japanese gentleman checked in, we all did a double take.? It turns out that his name was Ueno Fukiyama (or at least that's how it was printed out in Romaji in ALL CAPS.)? I commented to my XYL: "Well, that's a little hostile!"? It turned out that there were enough open seats for everybody to get on board, so all's well that ended well. toggle quoted message Show quoted text From: [email protected] <[email protected]> on behalf of Craig W8CS via groups.io <craig_severson@...> Sent: Tuesday, April 8, 2025 2:17 To: [email protected] <[email protected]> Subject: Re: [DRAKE-RADIO] T-4XC Meter Shunt Resistor? ? Thanks Dan & Peter! ? R49 came in at around 1600 ohms, replacing tomorrow. Surprisingly, Amazon has them but you have to buy in bulk. I just received the unusual message after my order,? "Your order for 10PCS 1.5K Ohm Resistor from FOCMKEAS has been confirmed" Can't wait to read the review comments with a vendor name like that.? ? I'm replacing the 3.3 ohm with a precision 1% and I'm going to run leads from it to banana jacks that I'm installing in the extra holes next to the cinch jones connector.? ? At 60mA bias I should read a drop of .198V across the jacks. With that funky non-zero meter in the T-4, I wonder what the actual bias is that I'm currently running.? ? Hopefully the extra wire length won't create any parasitic hooligans.? -- Craig/W8CS Greenville, SC

Previous Topic Next Topic