Re: [Drakelist] TR-7 Power Supply Question
Hi, I use an Astron RS35 with my tr7 and have none of the problems you spoke of. I get no dimming at all during key down or otherwise. The Tr7 does require more current than most all of the Japanese radios. It could be your Astron has a problem you would otherwise not be aware of except with the tr7. Good Luck David - Original Message - From: James Cobb To: drakelist@zerobeat.net Sent: Monday, February 16, 2009 12:24 PM Subject: [Drakelist] TR-7 Power Supply Question Gents, I'm trying to decide what I should do for a power supply for my TR-7. I'll try to give the Reader's Digest version, but I have a slight complication. My main power supply is an Astron RS-35M, but my TR-7 (S/N 46xx) generates some transmitted audio feedback in the receive audio when used with the RS-35M. I've used 3 other HF radios on the Astron and none of them have glitched and a full alignment on the TR-7 didn't cure the problem either. A few weeks ago, I tried running the high-current power lead off the Astron and the low-current lead from an MFJ-4125 switcher and the transmitted audio feedback totally disappeared. When using only the Astron, I was also getting some dimming of the panel lights which does not happen with the other radios. My guess is that my Astron has a slight issue. The MFJ-4125 doesn't provide enough current to run the whole radio which brings me to needing to do something about the power supply setup. (Note: G4ALG had posted some notes on a similar problem that got me to looking at this issue and his notes led me to run separate power lines for the high-current and low-current connections that fixed his problem and my problem.) So, for long-term use, I've been considering either getting a PS-7 or getting a dedicated high-current supply. I noticed yesterday that W4LGH is using a Jetstream 45A switcher to run his TR-7 (and whole shack, for that matter). I've heard that the PS-7 is built like a tank, but I'm wondering if it would be wiser in the long run to buy something like the 45A switcher that I could use for many purposes instead of getting a PS-7 that is dedicated to the TR-7. So, I'm looking for inputs here. I seem to be split 50-50. Sometimes, I think I should just get a PS-7 and be done with it. Other times, I think a new high-current unit would be fine and give me other options down the road. What say you? Thanks and 73, Dave / K8JDC -- ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] Cinch Jones Connector for TR7
Hello, does anyone have available a S-310-CCT cinch connector for a TR7? This is the one normally wired on the PS7 cable for rig control, the 10 pin connector. I've tried the sources outlined on Ron Baker's website and none in stock at either source. Also tried an internet search, and did'nt locate one. I need one to run ALC and Relay to a L4B amp. Thanks, David Wd9cmd___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[drakelist] Soft Start
Hi all, I'm considering a Harbach Soft Start mod for my TT amp and then got to thinking about modding some of my other rig power supplies for soft start as well. Such as my AC4, TenTec 12v and RS35 supplies. Any thoughts or comments before I do the deed? I probably should have checked the archives first, but figured I'd go ahead and post to the list. PS band condition were the pits Sunday for the Drake net. I could only hear Jeff and a couple others. Boy I hope things improve soon !! Thanks, David Wd9cmd
Re: [drakelist] DMM recommendation
Dick, Here's the link to the probe fix. If you have a good probe with your heathkit, then use it. You can also make one if so inclined and are the industrious sort. Also, I think B&K made a similar probe with the resistor installed and you could switch it in and out at or near the probe tip. Don't remember for sure. I have one with the original probe, calibrated, and one with the probe fix installed. It is also calibrated. Both work and read identical. I suppose there are cases where the probe fix may cause the meter to read wrong, but I have not found any in normal shop work. I believe mine does use the old style phone plug that heathkit sold with the unit new. As I recall it does have additional insulation between tip and sleeve, so that may be an issue to consider. My Flukes and Simpson gets the most use here but the heathkit VTVM is used often when I have an old receiver to align. http://www.theheathkitshop.com/vtvmprobefix.html Good luck, David Wd9cmd - Original Message - From: Donley To: drakelist@zerobeat.net Sent: Thursday, July 17, 2008 12:13 PM Subject: Re: [drakelist] DMM recommendation I would be interested in seeing what info you have on the probe changes. Dick - Original Message - From: David & Chris Drake To: drakelist@zerobeat.net Sent: Thursday, July 17, 2008 9:44 AM Subject: Re: [drakelist] DMM recommendation FYI to the group I too have a heath VTVM that I use frequently for receiver alignment and other uses. The probe is rarely included when you find one of the many versions (cosmetically) of pretty much the same design. The probe designed for these VTVM's is not necessary. The best thing to do is modify the input circuit, very simple to do. Then when the main switch is turned from AC to DC to Ohms, you have the correct input impedance and blocking. It makes the Heath as easy to use as the Simpson 260/270 series. You simply buy a set of standard probes and a stereo 1/4 phone plug and wire the two leads to it. I have the information here somewhere and can supply to anyone who wants. Its also available on the internet. David wd9cmd - Original Message - From: [EMAIL PROTECTED] To: drakelist@zerobeat.net Sent: Thursday, July 17, 2008 9:07 AM Subject: Re: [drakelist] DMM recommendation [EMAIL PROTECTED] writes: You might want to keep your eyes open for one of the Heath VTVMs Hi Garey, And somewhere on the internet was rebuilding instructions (or have it done) for the probes I believe I found the article somehow through the drakelist. Carl WD8NHK -- Get the scoop on last night's hottest shows and the live music scene in your area - Check out TourTracker.com!
Re: [drakelist] Drake 4 series screws
Thanks Mike, but Ron beat me to it ! No problem though, It would have been hard to find a home for 10,000. I'm sure Ron will have an inventory for some time to come!! And, I'd just a soon not be known as the "screw guy" ! Hi Hi. Later, David Wd9cmd - Original Message - From: MICHAEL TALLENT To: drakelist@zerobeat.net Sent: Wednesday, July 09, 2008 11:20 AM Subject: Re: [drakelist] Drake 4 series screws You should not have any problems ordering them, business or not. If there is a problem from this site you can order the exact same thing at the same price from amazon.com as that is where I orginally found the screws. Don't forget my standard "finders fee" of 100 screws :-) Mike W6MXV - Original Message - From: David & Chris Drake To: drakelist@zerobeat.net Sent: Wednesday, July 09, 2008 9:07 AM Subject: Re: [drakelist] Drake 4 series screws Hi guys, I've been monitoring the threads on the screws and it looks like the web page noted below, is for business purchases. I have a small retail business which could make the buy, divide them up and distribute to whoever needs them. Just want to be made whole eventually. I did reply to their link for a data sheet. I'll see then and make sure its the right screw. Later, David Wd9cmd - Original Message - From: [EMAIL PROTECTED] To: drakelist@zerobeat.net Sent: Tuesday, July 08, 2008 8:41 PM Subject: Re: [drakelist] Drake 4 series screws In a message dated 7/8/2008 8:26:45 PM Eastern Daylight Time, [EMAIL PROTECTED] writes: I found these that seem to be the right type- 6-32 slotted, pan head black oxide steel 1/4 inch long $83 for 1. http://www.fastenersuperstore.com/stores/superstore/step5.cfm?partId=110969&productCode=MSPB&category=Screws Mike W6MXV Do I hear Group Buy? Thats a great price, someone should go for it & part it out in 100pcs lots:-) Even at $5.00 per hundred, thats $500 plus shipping of course. 73... Rich WA2RQY/4
Re: [drakelist] WTB;Mic Cable
I completely agree. Best stuff out there I know of. David - Original Message - From: [EMAIL PROTECTED] To: drakelist@zerobeat.net Sent: Wednesday, June 04, 2008 12:57 PM Subject: Re: [drakelist] WTB;Mic Cable I would use some Heil cable. Has more conductors than you need, but it is excellent quality, good shielding, flexible, easy to solder to, etc. -Original Message- From: ddswl <[EMAIL PROTECTED]> To: Drakelist Cc: Drake <[EMAIL PROTECTED]> Sent: Wed, 4 Jun 2008 12:42 pm Subject: [drakelist] WTB;Mic Cable "ddswl" <[EMAIL PROTECTED]> made an utterance to the drakelist gang -- I am in need or 4 to 6 feet 3 cond mic cable. If you can help, please e-mail me direct. TnxDoug W7LNB [EMAIL PROTECTED] -- 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 -- -- Stay informed, get connected and more with AOL on your phone.
Re: [drakelist] Drake Forum at Hamvention
Wonderfull Thanks. David - Original Message - From: [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Thursday, May 08, 2008 10:55 AM Subject: Re: [drakelist] Drake Forum at Hamvention David and fellow Drake enthusiasts, We have a plan to tape the forum and it will be available on either CD or DVD format. Cost is not yet known but we have plans to tape the presentations. 73, The Drake Forum Committee -Original Message- From: David & Chris Drake <[EMAIL PROTECTED]> To: [EMAIL PROTECTED] Sent: Thu, 8 May 2008 9:30 am Subject: Re: [drakelist] Drake Forum at Hamvention Hi all, I'm considering driving over for the day, but not sure yet (gas may be $4 by the weekend!!). However, for those who cannot make the forum, will anyone be passing along the information discussed? I know last year there was a downloadable summary by one of the presenters. I know its a lot to ask from someone to do this, but hopefully there will be at least a summary of the most important points to pass along. Particularly those on troubleshooting. Thanks David - Original Message - From: [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Thursday, May 08, 2008 8:31 AM Subject: [drakelist] Drake Forum at Hamvention Fellow Drake Enthusiasts, We welcome you to Dayton, the Dayton Hamvention, and the Drake Forum to be held on Friday, May 16, at 230-345, in Room 2. The main speaker will be Rob Sherwood who will talk about some of the leading edge technology that Drake implemented decades ago and that others have started implementing in recent years. Other presentations will provide Tips and Tricks, as well as an Ask The Experts Q&A session to help you address technical issues. Also, we will have a FREE RAFFLE! The first 150 attendees to arrive at the forum will be given a free raffle ticket for some free prizes! Your chances of winning are better than the state lotteries, plus you don't have to put out any money. Safe travel and 73, Drake Forum Committee Plan your next roadtrip with MapQuest.com: America's #1 Mapping Site. -- Plan your next roadtrip with MapQuest.com: America's #1 Mapping Site.
Re: [drakelist] mic question
Peter, You might get by using a line matching transformer. You've got a high impedance mic, going into a low impedance input circuit. Line matching transformers are available at most places that sell microphones. Also, you might try using W2ENY? or something like that. Its advertized in QST and on the net. He sells pre-amp/equalizers in kit form that will do the same matching job plus much more. Particularly if its a broadcast mic, or said a better way, a full range mic, you can tailor it to the input to your voice characteristics. As for a preamp, you probably don't need one, since many of the old mics were fairly high output. Just try matching it up first. Oh, just remembered, Heil sells a transformer to go from a low mic to a high imp. input. Probably work in reverse as well. Its small enough to fit in a stand base...possibly. Good Luck David Wd9cmd - Original Message - From: Alterman, Peter (NIH/CIT) [E] To: [EMAIL PROTECTED] Sent: Tuesday, April 15, 2008 3:06 PM Subject: [drakelist] mic question I've got an old mike ~100k ohms, want to use it on ricebox that's looking for 500-600 ohms. Anybody know of a kit/project I can work on to cram an appropriate preamp into the old mike's base? TIA, Peter W2CDO
Re: [drakelist] Low-pass filter etc. setup.
"David Drake" <[EMAIL PROTECTED]> made an utterance to the drakelist gang -- Gary, Thats exactly how mine is hooked up. It works just fine, certainly better than before. I had TV problems before I put the 3300 on the antenna line. None afterward. The direct line is to my standard antenna. So in this case, I only match one antenna. Will probably sell my 3300 after digital. Won't need it. Or should'nt?? David - Original Message - From: "Garey Barrell" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Monday, March 24, 2008 11:57 AM Subject: Re: [drakelist] Low-pass filter etc. setup. Garey Barrell <[EMAIL PROTECTED]> made an utterance to the drakelist gang -- Bent - A thought occurred to me last night! (Scary!!) You could put the TV-3300 on the Direct 1 or Direct 2 output of the MN-2000 to the beam, since you really don't need it for the low bands and the beam is a good enough termination for the filter anyway. 73, Garey - K4OAH Glen Allen, VA Bent wrote: Hello All Is someone able to inform me about the most opmimal/recommendable way/order to combine the 1: TR-4CW, 2: TV-3300-LP, 3: W-4 and 4: MN2000. What is the correct way to combine 2, 3 and 4? The MN2000 is only used for the 80m dipol for limited space. Else FB33 for 10,15 and 20 meter. Thanks in advance. Regards Bent OZ5ZD. -- 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 --
[drakelist] TR7 Pushbuttons
Hello, Does anyone out there have a stock of pushbuttons for a TR7?? I need just one OEM button, but would be interested in a whole set, if in exc. condition. Thanks, David Wd9cmd
[drakelist] Power Supply for TR-7(a)
Hi all, I'm interested in hearing the pro's and con's regarding using a switching power supply with a TR-7(a). I remember this question coming up on the Sunday PM technical net some time ago, but forgot the details. As I recall, it is not recommended, but don't remember why. Thanks David Wd9cmd
[drakelist] Email address
Hi all, I was trying to email Jeff Covelli and get it returned as "access denied", "service unavailable". Anybody know his correct address?? Thanks, David Drake Wd9cmd
