RE: [drakelist] TR-7 AF control
Ken I had the same problem with an old hollow-state receiver. My XYL said that either that damn radio had to go or she'd leve me. Gosh I miss her. Just kidding. There's something wrong with the AGC in the old receiver. I'll get to it one of these days. Rich - KE1EV _ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of K Allen Sent: Monday, February 18, 2008 3:56 PM To: [EMAIL PROTECTED] Subject: [drakelist] TR-7 AF control I recently acquired TR-7 SN 3173, my first. Is it normal for the AF control to provide enough volume to still hear easily when full counter-clockwise or is the pot changing value with age? Only way I have of cutting audio volume down lower is by use of RF control. Doesn't bother me but I have a picky XYL who's not all that fond of my hobby. Thanks, Ken - N0VA
Re: [drakelist] TR-7 AF control
Hi Ken, Yes, mine does it too but not really very loud. I have SN 5586. 73, Bob VE3XM - Original Message - From: K Allen To: [EMAIL PROTECTED] Sent: Monday, February 18, 2008 3:55 PM Subject: [drakelist] TR-7 AF control I recently acquired TR-7 SN 3173, my first. Is it normal for the AF control to provide enough volume to still hear easily when full counter-clockwise or is the pot changing value with age? Only way I have of cutting audio volume down lower is by use of RF control. Doesn't bother me but I have a picky XYL who's not all that fond of my hobby. Thanks, Ken - N0VA
Re: [drakelist] TR-7 AF control
Dieter Horst [EMAIL PROTECTED] made an utterance to the drakelist gang -- Hello Ken, I am afraid, it is normal. Reason is that when audio is completely muted, the radio is off because the on/off switch is activated by then... There is only one cure I once tried: you add a resistor to decrease the max. volume and therefore also the min. volume. But I removed it again and use the method you described i. e. RF control. Enjoy your TR-7 ! 73, Dieter DL5RDO I recently acquired TR-7 SN 3173, my first. Is it normal for the AF control to provide enough volume to still hear easily when full counter-clockwise or is the pot changing value with age? Only way I have of cutting audio volume down lower is by use of RF control. Doesn't bother me but I have a picky XYL who's not all that fond of my hobby. Thanks, Ken - N0VA -- Submissions:[EMAIL PROTECTED] 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] TR-7 AF control
I recently acquired TR-7 SN 3173, my first. Is it normal for the AF control to provide enough volume to still hear easily when full counter-clockwise or is the pot changing value with age? Only way I have of cutting audio volume down lower is by use of RF control. Doesn't bother me but I have a picky XYL who's not all that fond of my hobby. Thanks, Ken - N0VA
Re: [drakelist] TR-7 AF control
This is a known characteristic of this radio. -Original Message- From: K Allen [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Mon, 18 Feb 2008 3:55 pm Subject: [drakelist] TR-7 AF control I recently acquired TR-7 SN 3173, my first.? Is it normal for the AF control to provide enough volume to still hear easily when full counter-clockwise or is the pot?changing value with age?? Only way I have of cutting audio volume down lower is by use of RF control.? Doesn't bother me but I have a picky XYL who's not all that fond of my hobby. ? Thanks, Ken - N0VA? More new features than ever. Check out the new AOL Mail ! - http://webmail.aol.com
Re: [drakelist] TR-7 AF control
Garey Barrell [EMAIL PROTECTED] made an utterance to the drakelist gang -- Ken - This is normal for the TR-7. It's why most gear has the On-Off switch on some control OTHER than the AF Gain! The real problem is that the control was ordered by Drake as two pot sections and one switch individually rather than as an assembled unit. Pots that are _designed_ with a switch have a dead space at the bottom of the rotation that is specified to allow the wiper to go to the CCW rotation of the pot element without activating the switch and still have enough mechanical travel to activate the switch. 73, Garey - K4OAH Glen Allen, VA Drake 2-B, 4-B, C-Line TR-4/C Service Supplement CDs www.k4oah.com K Allen wrote: I recently acquired TR-7 SN 3173, my first. Is it normal for the AF control to provide enough volume to still hear easily when full counter-clockwise or is the pot changing value with age? Only way I have of cutting audio volume down lower is by use of RF control. Doesn't bother me but I have a picky XYL who's not all that fond of my hobby. Thanks, Ken - N0VA -- Submissions:[EMAIL PROTECTED] 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] TR-7 AF control
The real reason the audio doesn't go all the way down has nothing to do with the switch. When the control is all the way down but the switch is not off, the wiper is perfectly aligned with the contact on the carbon. What causes it to still pass audio is the contact on the wafer has about a 1/16 of carbon between it and the wiper. This causes the resistance to be anywhere from 3 to 10 ohms, just enough to make it so you can still hear it. I have 5 TR7s and I disassembled the pot on each one and bent the outer contact on the wiper so it is out far enough to bypass that small resistance on the wafer. Thus on all of mine the volume goes all the way down. Edwin Joe Pyles KC9LAD. At 04:15 PM 2/18/2008, you wrote: Dieter Horst [EMAIL PROTECTED] made an utterance to the drakelist gang -- Hello Ken, I am afraid, it is normal. Reason is that when audio is completely muted, the radio is off because the on/off switch is activated by then... There is only one cure I once tried: you add a resistor to decrease the max. volume and therefore also the min. volume. But I removed it again and use the method you described i. e. RF control. Enjoy your TR-7 ! 73, Dieter DL5RDO I recently acquired TR-7 SN 3173, my first. Is it normal for the AF control to provide enough volume to still hear easily when full counter-clockwise or is the pot changing value with age? Only way I have of cutting audio volume down lower is by use of RF control. Doesn't bother me but I have a picky XYL who's not all that fond of my hobby. Thanks, Ken - N0VA -- Submissions:[EMAIL PROTECTED] 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] TR-7 AF control
Gary Poland [EMAIL PROTECTED] made an utterance to the drakelist gang -- Ken, The low audio with the AF gain fully CCW is normal. It has to do with the make up of the controls that Drake used. I believe that Drake began hand selecting controls for the later TR-7's. 73, Gary -- Submissions:[EMAIL PROTECTED] 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] TR-7 AF control
Jim Shorney [EMAIL PROTECTED] made an utterance to the drakelist gang -- On Mon, 18 Feb 2008 16:26:26 -0500, Garey Barrell wrote: Pots that are _designed_ with a switch have a dead space at the bottom of the rotation that is specified to allow the wiper to go to the CCW rotation of the pot element without activating the switch and still have enough mechanical travel to activate the switch. It can be argued that this is a feature, not a bug. It's not uncommon in the commercial radio world to have a minimum volume level that prevents users from turning the volume completely down, thus eliminating the I didn't hear the call excuse. And the TR7 design was, after all, offered commercially. These days, of course, it's done in software -- Jim Shorney --.--Put complaints in this box jshorney (at) inebraska.com Ham Radio NU0C Lincoln, NE, USA EN10ps http://incolor.inetnebr.com/jshorney/ -- Submissions:[EMAIL PROTECTED] 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] TR-7 AF control
David Chris Drake [EMAIL PROTECTED] made an utterance to the drakelist gang -- One last ditto. Yes, its the same on the TR7A model as well. Strong signals just keep on coming through. Good thing my wife's got a hearing problem. Otherwise I'd have to make a choice !! Just kiddingnot really,.well...maybe?? David Wd9cmd - Original Message - From: Jim Shorney [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Monday, February 18, 2008 6:04 PM Subject: Re: [drakelist] TR-7 AF control Jim Shorney [EMAIL PROTECTED] made an utterance to the drakelist gang -- On Mon, 18 Feb 2008 16:26:26 -0500, Garey Barrell wrote: Pots that are _designed_ with a switch have a dead space at the bottom of the rotation that is specified to allow the wiper to go to the CCW rotation of the pot element without activating the switch and still have enough mechanical travel to activate the switch. It can be argued that this is a feature, not a bug. It's not uncommon in the commercial radio world to have a minimum volume level that prevents users from turning the volume completely down, thus eliminating the I didn't hear the call excuse. And the TR7 design was, after all, offered commercially. These days, of course, it's done in software -- Jim Shorney --.--Put complaints in this box jshorney (at) inebraska.com Ham Radio NU0C Lincoln, NE, USA EN10ps http://incolor.inetnebr.com/jshorney/ -- Submissions:[EMAIL PROTECTED] 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:[EMAIL PROTECTED] 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] TR-7 AF control
ron [EMAIL PROTECTED] made an utterance to the drakelist gang -- Ah bees listening (reading) this heah thread and have come to one conclusion about Drake ownahs if it's bee choice between your love and your uddah love, the spouse loses (heh heh) Drake ownahs would rathah fight than switch! Ron dah weathahs crazy heah in MA -- Submissions:[EMAIL PROTECTED] 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] TR-7 AF control
Garey Barrell [EMAIL PROTECTED] made an utterance to the drakelist gang -- Gary - Yeah, the explanation that I posted earlier is what Bill told me, and it made sense. He even referred me to a manufacturer that specified the degrees of rotation for that very problem. I learned something, but there's always another expert on the internet! :-) I believe the problem was because a 3k Audio taper, 10k Linear taper and a double-pole double-through switch wasn't something you could find in the catalog and it had to be 'assembled' like CTS offered back then. The simple explanation is also why the cheapie AC-DC radios didn't have the problem, because those controls were ordered WITH switches. 73, Garey - K4OAH Glen Allen, VA Drake 2-B, 4-B, C-Line TR-4/C Service Supplement CDs www.k4oah.com Gary Poland wrote: Gary Poland [EMAIL PROTECTED] made an utterance to the drakelist gang -- Ken, The low audio with the AF gain fully CCW is normal. It has to do with the make up of the controls that Drake used. I believe that Drake began hand selecting controls for the later TR-7's. 73, Gary -- Submissions:[EMAIL PROTECTED] 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] TR-7 AF control
Don't take my word for it, take one apart yourself. Edwin Joe Pyles KC9LAD. At 09:46 PM 2/18/2008, you wrote: Garey Barrell [EMAIL PROTECTED] made an utterance to the drakelist gang -- Gary - Yeah, the explanation that I posted earlier is what Bill told me, and it made sense. He even referred me to a manufacturer that specified the degrees of rotation for that very problem. I learned something, but there's always another expert on the internet! :-) I believe the problem was because a 3k Audio taper, 10k Linear taper and a double-pole double-through switch wasn't something you could find in the catalog and it had to be 'assembled' like CTS offered back then. The simple explanation is also why the cheapie AC-DC radios didn't have the problem, because those controls were ordered WITH switches. 73, Garey - K4OAH Glen Allen, VA Drake 2-B, 4-B, C-Line TR-4/C Service Supplement CDs www.k4oah.com Gary Poland wrote: Gary Poland [EMAIL PROTECTED] made an utterance to the drakelist gang -- Ken, The low audio with the AF gain fully CCW is normal. It has to do with the make up of the controls that Drake used. I believe that Drake began hand selecting controls for the later TR-7's. 73, Gary -- Submissions:[EMAIL PROTECTED] 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 --
