[drakelist] TR7 Power Output Addendum
"Jim Shorney" <[EMAIL PROTECTED]> made an utterance to the drakelist gang -- I had intentionally set the power output of my TR7 after the PA rebuild a little on the conservative side just before Field Day, to see how things went. Since I still had the radio on the bench after investigating the mic connector grounding, I decided to set it up "by the book" and see how that worked. The service manual says to set the PO to 140-150 watts on 20 meters with the ALC pot. So I went for 145 watts. I found that to get ALC action across the whole 10 Meter band, I had to adjust the predriver gain pot at 29.7 MHz. Granted, most people would probably never transmit that high in the band with the TR7, but I wanted to get it right. Here are the results: 1.8 MHz - 135 Watts 3.8 MHz - 146 Watts 7.3 MHz - 151 Watts 14.3 MHz - 145 Watts 18.1 MHz - 120 Watts 21.3 MHz - 117 Watts 24.9 MHz - 110 Watts 27.3 MHz - 109 Watts 28.3 MHz - 108 Watts 28.8 MHz - 106 Watts 29.3 MHz - 104 Watts 29.7 MHz - 98 Watts After she was buttoned up, I was tuning around 20 Meters to see what could be heard. At 22:10 CDT, I worked the TO5E DXpedition on 14.250 - he answered my first call. I think it's working 73 -Jim (yeah, I forgot 30 Meters) NU0C -- Submissions:drakelist@zerobeat.net Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Zerobeat Web Page: www.zerobeat.net - sponsored by www.tlchost.net --
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Re: [drakelist] TR-4C tune-up procedures....
Phil, Its not always easy to see the plate dip on the TR-4 plate meter, especially at low plate currents. Over time you will get an idea where the controls normally sit for a given band. I start out by setting the PLATE LOAD and TUNE controls in a ballpark position. Then I peak the receiver noise with the RF TUNE control. Then I put the transceiver in CW mode and adjust the XMTR GAIN control just enough to see an increase in plate current. Keeping the transceiver keyed only for brief periods I then adjust the RF TUNE and PLATE controls for maximum output. Next step is to bring the XMTR GAIN to 12:00 and adjust everything for maximum output. I tune all my Drakes this way. You really need to invest in a watt meter even if its just a relative output meter and not calibrated. 73, Gary
[drakelist] TR-4C tune-up procedures....
Folks: Does anyone out there have a suggestion (or two) on how I can "tune" my Drake TR-4C for transmitting an easier way other than the "manual's" method?I do not have access to a wattmeter or anything like that to put between the TR-4C and the antenna. I kind of find the manual's tune-up procedure a little too complicated(?) and perhaps prone to me accidentally over-loading the "final" tubes. Just going by making adjustments to the meter reading(s) seems a bit "iffy" to me. Just my feeling. Thank you. AB8ZP
Re: [drakelist] looking for a set of twins
What am I missing? Your listing where? I'm interested in looking too as I'm wanting a 4C station. Best Regards, Stevan A. White, W5SAW SW Commercial Electronics 928 South Crockett Street Amarillo, Texas 79102 Phone 806-681-7228 [EMAIL PROTECTED] "The hardest arithmetic to master is that which enables us to count our blessings." (Eric Hoffer, American Author) [EMAIL PROTECTED] wrote: hi check my listing for a complete station, n4je. all mint condition and I am original owner on all thanks joe
Re: [drakelist] T-4X: No Audio On SSB / AM
Sounds like a bad mic element or, bad solder joint or, maybe even an open ground connection... Suggest using a different mic. 73's, Charlie... - Original Message - From: Jim Shorney To: drakelist@zerobeat.net Sent: Saturday, July 05, 2008 2:14 PM Subject: Re: [drakelist] T-4X: No Audio On SSB / AM "Jim Shorney" <[EMAIL PROTECTED]> made an utterance to the drakelist gang -- On Sat, 5 Jul 2008 11:29:29 -0500, w4pro wrote: >I had to rig up an amplifier between the mike and the rig to get enough >audio on my T-4XB. Until I did that, I got no output on SSB. If you had to use an amplifier, something is wrong somewhere. 73 -Jim NU0C -- Submissions:drakelist@zerobeat.net Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Zerobeat Web Page: www.zerobeat.net - sponsored by www.tlchost.net --
Re: [drakelist] T-4X: No Audio On SSB / AM
"Jim Shorney" <[EMAIL PROTECTED]> made an utterance to the drakelist gang -- On Sat, 5 Jul 2008 11:29:29 -0500, w4pro wrote: >I had to rig up an amplifier between the mike and the rig to get enough >audio on my T-4XB. Until I did that, I got no output on SSB. If you had to use an amplifier, something is wrong somewhere. 73 -Jim NU0C -- Submissions:drakelist@zerobeat.net Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Zerobeat Web Page: www.zerobeat.net - sponsored by www.tlchost.net --
Re: [drakelist] looking for a set of twins
hi check my listing for a complete station, n4je. all mint condition and I am original owner on all thanks joe -- [EMAIL PROTECTED] wrote: Does anyone in the group have a set of twins for sale. Iam looking for a nice pair, does not have to be collector quality. A,B,orC, does not really matter,but b or c would be my choice.would need ac-4 also. Please get back off list. thanks for any help on this. dale wt4t Get the Moviefone Toolbar. Showtimes, theaters, movie news, & more! Click for a credit repair consultation, raise your FICO score. http://thirdpartyoffers.juno.com/TGL2131/fc/Ioyw6iifRtVG8h97LVOIbE3cdUlJZV0lsZcxMURiTMUboylqKKeeVS/ hamstuff2.rtf Description: hamstuff2.rtf
Re: [drakelist] T-4X: No Audio On SSB / AM
"w4pro" <[EMAIL PROTECTED]> made an utterance to the drakelist gang -- I had to rig up an amplifier between the mike and the rig to get enough audio on my T-4XB. Until I did that, I got no output on SSB. Jim/W4PRO -- Submissions:drakelist@zerobeat.net Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Zerobeat Web Page: www.zerobeat.net - sponsored by www.tlchost.net --
Re: [drakelist] T-4X: No Audio On SSB / AM
"Dan Ringer" <[EMAIL PROTECTED]> made an utterance to the drakelist gang -- As with many things the best way to identify a defect in a system is to "have one in the closet." Try a different microphone. (A true ham never has just one of anything -- which may by necessity include friends with microphones.) Dan, K8WV -- Submissions:drakelist@zerobeat.net Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Zerobeat Web Page: www.zerobeat.net - sponsored by www.tlchost.net --
Re: [drakelist] T-4X: No Audio On SSB / AM
john <[EMAIL PROTECTED]> made an utterance to the drakelist gang -- Yes, you can probably check the mic circuit by keying the rig and dragging a ground across the mic input, and seeing if the plate current deflects at all... But... I'm guessing it's mic... John k5mo At 10:33 AM 7/5/2008, Garey Barrell wrote: Garey Barrell <[EMAIL PROTECTED]> made an utterance to the drakelist gang -- Eddy - OK. Well if it works in TUNE, then ALL the audio stages are working fine. In TUNE, the first mic preamp stage is switched to become a phase shift audio oscillator, and that tone then goes through the transmitter just as if you whistled into the microphone. That same tone is used for the sidetone, and to keep the PTT relay closed in CW. So this leaves a very narrow field for failures, i.e., a couple of switch contacts or the mic jack. So... Either John is correct that your mic is bad, (D-104's are prone to failing from heat and/or humidity,) the wiring to the mic jack is wrong, or there is a problem with the switching between mic amp and TUNE oscillator. You can check the mic with a scope, if you have one, if not, a VTVM or "good" DMM right at the cartridge terminals should show considerable (a volt or so) AC output when you whistle into the mic. 73, Garey - K4OAH Glen Allen, VA Drake 2-B, 4-B, C-Line & TR-4/C Service Supplement CDs EP Swynar wrote: "EP Swynar" <[EMAIL PROTECTED]> made an utterance to the drakelist gang -- On 4th July, Garey wrote... "...If you have a KEY plugged in, it must be closed (or unplugged) for SSB..." *** Hi Garey, Well, I was HOPING that the solution to my lack of audio on SSB / AM with the T-4X would have been that easy, but alas, there was no joy in Muddville (again) when I tried it here (double sigh!). I measured the resistances on both V9 & V10 afterward, & all appears to be normal in that regard...next I guess I'll have to measure the actual voltages themeselves. The rig fires up on CW splendidly: it tunes up just as outlined in the manual, has a nice side tone, mutes the R-4, etc. etc. Yet, when I switch to SSB, I CAN trip the internal relay by pressing the PTT button --- but I get only a VERY slight indication of plate current (NO output power) in the mode, and no upward kicks of the meter in any position when tapping the mic...even with the gain cranked way up. With the rig set to AM, the plate current DOES swing hard right momentarily when the PTT is first keyed, but I suspect that has something to do with the controlled carrier set-up in that mode. Back to the ol' proverbial drawing board for me, I guess...! ~73~ Eddy VE3CUI - VE3XZ -- Submissions:drakelist@zerobeat.net Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Zerobeat Web Page: www.zerobeat.net - sponsored by www.tlchost.net -- -- Submissions:drakelist@zerobeat.net Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Zerobeat Web Page: www.zerobeat.net - sponsored by www.tlchost.net --
Re: [drakelist] T-4X: No Audio On SSB / AM
Garey Barrell <[EMAIL PROTECTED]> made an utterance to the drakelist gang -- Eddy - OK. Well if it works in TUNE, then ALL the audio stages are working fine. In TUNE, the first mic preamp stage is switched to become a phase shift audio oscillator, and that tone then goes through the transmitter just as if you whistled into the microphone. That same tone is used for the sidetone, and to keep the PTT relay closed in CW. So this leaves a very narrow field for failures, i.e., a couple of switch contacts or the mic jack. So... Either John is correct that your mic is bad, (D-104's are prone to failing from heat and/or humidity,) the wiring to the mic jack is wrong, or there is a problem with the switching between mic amp and TUNE oscillator. You can check the mic with a scope, if you have one, if not, a VTVM or "good" DMM right at the cartridge terminals should show considerable (a volt or so) AC output when you whistle into the mic. 73, Garey - K4OAH Glen Allen, VA Drake 2-B, 4-B, C-Line & TR-4/C Service Supplement CDs EP Swynar wrote: "EP Swynar" <[EMAIL PROTECTED]> made an utterance to the drakelist gang -- On 4th July, Garey wrote... "...If you have a KEY plugged in, it must be closed (or unplugged) for SSB..." *** Hi Garey, Well, I was HOPING that the solution to my lack of audio on SSB / AM with the T-4X would have been that easy, but alas, there was no joy in Muddville (again) when I tried it here (double sigh!). I measured the resistances on both V9 & V10 afterward, & all appears to be normal in that regard...next I guess I'll have to measure the actual voltages themeselves. The rig fires up on CW splendidly: it tunes up just as outlined in the manual, has a nice side tone, mutes the R-4, etc. etc. Yet, when I switch to SSB, I CAN trip the internal relay by pressing the PTT button --- but I get only a VERY slight indication of plate current (NO output power) in the mode, and no upward kicks of the meter in any position when tapping the mic...even with the gain cranked way up. With the rig set to AM, the plate current DOES swing hard right momentarily when the PTT is first keyed, but I suspect that has something to do with the controlled carrier set-up in that mode. Back to the ol' proverbial drawing board for me, I guess...! ~73~ Eddy VE3CUI - VE3XZ -- Submissions:drakelist@zerobeat.net Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Zerobeat Web Page: www.zerobeat.net - sponsored by www.tlchost.net --
[drakelist] FS. new main tuning knobs have arrived!
Well, I needed a set of new main tuning knobs for my "B" line and my TR4. They have not been made for years. So, I had them made by the original Factory that made them for Drake. I made them better by including a 1/4 brass insert for the PTO shaft instead of plastic. The chrome insert is already factory mounted. Cost is $20 each, $3 dollar shipping for up to 3 knobs. Also, I have new bar knobs. A set of 9 knobs for the B line, (includes preselector knob.) is $36..$3 shipping. Or they are $4 each. Please see the pictures on WB4HFN.com Thanks for looking, 73's Al KC9YS. P.SThe skirts are not included. As of now, no-one is making the skirts. I get many requests for them.Al
[drakelist] T-4X: No Audio On SSB / AM
"EP Swynar" <[EMAIL PROTECTED]> made an utterance to the drakelist gang -- On 4th July, Garey wrote... "...If you have a KEY plugged in, it must be closed (or unplugged) for SSB..." *** Hi Garey, Well, I was HOPING that the solution to my lack of audio on SSB / AM with the T-4X would have been that easy, but alas, there was no joy in Muddville (again) when I tried it here (double sigh!). I measured the resistances on both V9 & V10 afterward, & all appears to be normal in that regard...next I guess I'll have to measure the actual voltages themeselves. The rig fires up on CW splendidly: it tunes up just as outlined in the manual, has a nice side tone, mutes the R-4, etc. etc. Yet, when I switch to SSB, I CAN trip the internal relay by pressing the PTT button --- but I get only a VERY slight indication of plate current (NO output power) in the mode, and no upward kicks of the meter in any position when tapping the mic...even with the gain cranked way up. With the rig set to AM, the plate current DOES swing hard right momentarily when the PTT is first keyed, but I suspect that has something to do with the controlled carrier set-up in that mode. Back to the ol' proverbial drawing board for me, I guess...! ~73~ Eddy VE3CUI - VE3XZ -- Submissions:drakelist@zerobeat.net Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Zerobeat Web Page: www.zerobeat.net - sponsored by www.tlchost.net --
