[drakelist] poor tx audio
well i have over come most of the little problems with my b-line. thanks to everyone on the list. now i need to work on my tx audio on my t-4xb. it really sounds pinched up. sounds hollow. any how not good. any suggestions and comments would be appreciated. also i am still looking for a lsb filter for the t-4xb. i bought one off qth for 65.00 but it came out of a t-4x. i dont know if it will work or not. if someone needs this one maybe we can trade. Carey Lockhart, KC5GTT [EMAIL PROTECTED] www.kc5gtt.com
[drakelist] R4C function switch
Drakelist de PA2DW, The function switch (off/stby//on/ext.mute/etc.) in my R4C is beginning to warn-out. Too much on/off switching I guess hi! I have fixed it temporarely, but it is obvious I need a new one. In fact I only need the shaft with the step-organiser or how would we call that part... Any info on a source? VY 73 and best wishes for the NewYear! Dick PA2DW *
Re: [drakelist] R4C function switch
As a side note, using a Variac or Powerstat to turn an outlet strip on/off, gently at that,?is particularly nice when an indicating meter is part of the arrangement. -Original Message- From: [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Thu, 27 Dec 2007 1:24 pm Subject: Re: [drakelist] R4C function switch [EMAIL PROTECTED] writes: Drakelist de PA2DW, ? The function switch (off/stby//on/ext.mute/etc.) in my R4C is beginning to?warn-out. Too much on/off switching Hi Dick, Hi Dick, Lots of the old equipment falls into that category. I was advised to use one of the multi outlet plug in boxes to alleviate that on off wear, with the comment that?many of our?switch's were rare to unavailable.? Went a?bit further and got one of the computer equipment panels that had separately switched outlets so that I could control each separate device. ?73s Carl WD8NHK See AOL's top rated recipes and easy ways to stay in shape for winter. More new features than ever. Check out the new AOL Mail ! - http://webmail.aol.com
Re: [drakelist] Soft key and fan controller for HF amplifiers
thanks Evan.. I was kinda of wondering how drake did the fan control... the L7 uses a blower or fan? Mike, WB8VGE SunLight Energy Systems The Heathkit Shop http://www.theheathkitshop.com/ J e e p o|||o Note: No trees were killed in the sending of this message, but a large number of electrons were terribly inconvenienced On Dec 27, 2007, at 1:53 PM, [EMAIL PROTECTED] wrote: Mike, The L4B uses a constant speed blower. In contrast, the L7 uses a two speed fan that accomplishes this task by using a resistor in series with the fan. When the exhaust temperature exceeds the value on the thermostat, it shorts out the resistor, and the fan goes into high speed (i.e. normal, full 110 vac voltage to the fan). It will stay in this condition until the temperature drops accordingly. Good luck with the Dentron and thanks for sharing your experiences. Happy New Year and 73s, Evan -Original Message- From: Mike Bryce [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Thu, 27 Dec 2007 1:31 pm Subject: [drakelist] Soft key and fan controller for HF amplifiers Boys...and girls... I have been working on a old dentron clipperton L amplifier... after much research and email chatting,I have it up and running. Designed a new power supply pcb for it and it seems to work like it should.. One of the things I was told was the clipperton L is a really solid 1Kw amp and a so so 2Kw amp one thing that get's it goat is that is over heats.. The unit I have has a 390 ohm resistor in series with the ac supply feeding the fan motor. Shorting out the resistors puts the fan in high gear. it also makes it a lot louder So... a simple fix here's what I did Added a softkey that is optically coupled to the radio. Instead of switching 25 volts at 250 ma, the radio only sees 12 volts at 10 ma. The amp is keyed by a high power MOSFET or you can select relay output keying (works with any amp that way) then I added a fan controller when you key the amp, nothing happens but keep the amp keyed a minute or two and the fan kicks up to high speed. after you unkey, the fan will run on high for a while and then drop back to low speed the amount of time will depend on how long you talk! the longer you key down, the longer the fan will run in high speed I don't know if the drake amps use any sort of resistor in the fan lead or not. but... you can always add an extra fan or add a fan to the back of the TRXX series rigs.. it was a fun project anyone interested let me know mike Mike, WB8VGE SunLight Energy Systems The Heathkit Shop http://www.theheathkitshop.com/ J e e p o|||o Note: No trees were killed in the sending of this message, but a large number of electrons were terribly inconvenienced = More new features than ever. Check out the new AOL Mail!
Re: [drakelist] Soft key and fan controller for HF amplifiers
Mike, The L4B uses a blower to pressurize a plenum under the chassis which then routes the air to the sockets, chimneys, etc.? The L7 uses a muffin-style fan to draw air out of the cabinet, where openings in the bottom plate allow the air to go across the tube sockets, past the tubes (without chimneys) and then through the fan opening.? The thermostat (thermostatic switch) is positioned in the airflow path on the internal side of the cabinet. Each method has its pro and con. 73, Evan -Original Message- From: Mike Bryce [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Thu, 27 Dec 2007 2:11 pm Subject: Re: [drakelist] Soft key and fan controller for HF amplifiers thanks Evan.. I was kinda of wondering how drake did the fan control...? the L7 uses a blower or fan? Mike, WB8VGE SunLight Energy Systems The Heathkit Shop http://www.theheathkitshop.com/ J e e p o|||o? Note: No trees were killed in the sending of this message, but a large number of electrons were terribly inconvenienced On Dec 27, 2007, at 1:53 PM, [EMAIL PROTECTED] wrote: Mike, ? The L4B uses a constant speed blower.? In contrast, the L7 uses a two speed fan that accomplishes this task by using a resistor in series with the fan.? When the exhaust temperature exceeds the value on the thermostat, it shorts out the resistor, and the fan goes into high speed (i.e. normal, full 110 vac voltage to the fan).? It will stay in this condition until the temperature drops accordingly. Good luck with the Dentron and thanks for sharing your experiences. Happy New Year and 73s, Evan -Original Message- From: Mike Bryce [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Thu, 27 Dec 2007 1:31 pm Subject: [drakelist] Soft key and fan controller for HF amplifiers Boys...and girls... I have been working on a old dentron clipperton L amplifier...? after much research and email chatting,I have it up and running. Designed a new power supply pcb for it and it seems to work like it should.. One of the things I was told was the clipperton L is a really solid 1Kw amp and a so so 2Kw amp one thing that get's it goat is that is over heats.. The unit I have has a 390 ohm resistor in series with the ac supply feeding the fan motor. ?Shorting out the resistors puts the fan in high gear. it also makes it a lot louder So... a simple fix here's what I did? Added a softkey that is optically coupled to the radio. Instead of switching 25 volts at 250 ma, the radio only sees 12 volts at 10 ma. The amp is keyed by a high power MOSFET or you can select relay output keying (works with any amp that way) then I added a fan controller when you key the amp, nothing happens but keep the amp keyed a minute or two and the fan kicks up to high speed. after you unkey, the fan will run on high for a while and then drop back to low speed the amount of time will depend on how long you talk! the longer you key down, the longer the fan will run in high speed I don't know if the drake amps use any sort of resistor in the fan lead or not. but... you can always add an extra fan or add a fan to the back of the TRXX series rigs.. it was a fun project? anyone interested let me know mike Mike, WB8VGE SunLight Energy Systems The Heathkit Shop http://www.theheathkitshop.com/ J e e p o|||o? Note: No trees were killed in the sending of this message, but a large number of electrons were terribly inconvenienced = More new features than ever. Check out the new AOL Mail! = More new features than ever. Check out the new AOL Mail ! - http://webmail.aol.com
RE: [drakelist] R4C function switch
Dick I have a sailboat with lots of electronics onboard. The salt air causes problems with switches, breakers, and pots on the equipment onboard. I've tried many different contact cleaners and lubricants, but PB Blaster works best. This is a penetrating spray lubricant sold in most hardware stores. I don't know if this is a good long-term fix, but I've had very good success restoring old switches and pots using it. It has something in there that removes oxidation and it lubricates the switches at the same time. One would think that leaving an oil film on the contacts would cause the switch to collect dirt and quickly need to be re-cleaned, but I haven't found that to be the case. If you are sure that the switch is gone anyway, there is nothing to lose by trying the stuff. I've used it on all the old radios I've restored. It also works like magic on a variable air-gap capacitor and associated hardware used for tuning. Of course, it there is a mechanical problem with your switch, no lubricant will help. If it just makes poor contact or is difficult to actuate, it might surprise you. If you do try it, I'd be interested to hear the result. Rich - KE1EV _ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of DW Harms Sent: Thursday, December 27, 2007 11:28 AM To: [EMAIL PROTECTED] Subject: [drakelist] R4C function switch Drakelist de PA2DW, The function switch (off/stby//on/ext.mute/etc.) in my R4C is beginning to warn-out. Too much on/off switching I guess hi! I have fixed it temporarely, but it is obvious I need a new one. In fact I only need the shaft with the step-organiser or how would we call that part... Any info on a source? VY 73 and best wishes for the NewYear! Dick PA2DW * http://msgtag.com/?source=ffooter has notified the sender that this message has been received.
Re: [drakelist] R4C function switch
Christopher Kovacs [EMAIL PROTECTED] made an utterance to the drakelist gang -- I had a problem with my function switch. It lost it's indent so that you could not feel the indent of where the switch position was located. I ended up taking the switch apart to discover that the brass raised area where the switch passes was worn to the point it was flat and the bass indent was no more. What I did was to file this area to accept silver solder. I melted a small blob which match the missing indent. I re-assembled the switch it it was as good as new. Now I am not sure how long this will last, but it's better than no indent position of the switch; I guess I could always touch it up. Hope this helps others Cheers, Chris w0anm -- 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] Calibrator $150 and WTB...
I am anxious to get a calibrator for my 2A but not at almost $150 (on ebay). I must admit it appeared to be in nice condition and I am sure glad for both the seller and the buyer that this was a special deal for both. TO REPOST: WTB Drake (2AQ or 2BQ)--speaker/Q-multiplier and (2AC or 2BC)Crystal Calibrator Thanks Alan KB7MBI Woodinville, WA **See AOL's top rated recipes (http://food.aol.com/top-rated-recipes?NCID=aoltop000304)
