[drakelist] AC-4
Everyone, The AC-4 problem my friend was having where he was having trouble interchanging them turned out to be bad contacts on the connectors! Detox did the trick and all is well thanks to all who answered my question. Dan -- Submissions:[EMAIL PROTECTED] Subscribe: [EMAIL PROTECTED] - subscribe drakelist in body Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Brought to you courtesy of TLCHost.net http://www.tlchost.net/ --
[drakelist] Static protection
I have a very nice TR-7/R-7 pair and I want to install some protection on the input of the TR-7 to protect from static etc.. anyone got suggestions of product and/or supplier ??? -- Submissions:[EMAIL PROTECTED] Subscribe: [EMAIL PROTECTED] - subscribe drakelist in body Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Brought to you courtesy of TLCHost.net http://www.tlchost.net/ --
[drakelist] T4XB receiver mute problem
I have made up a mute cord that runs from the accesory plug on my SX101A to the rceiver mute jack on my new T4XB. The manual says the jack provides a closed circuit on receive (which it does fine) and an open circuit for transmit. (which it does not). I know the cable works because I can mute and unmute the receiver by shorting out the T4XB end of the cable. I'm at a loss. Any ideas? Thanks! Andy W1AWB -- Submissions:[EMAIL PROTECTED] Subscribe: [EMAIL PROTECTED] - subscribe drakelist in body Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Brought to you courtesy of TLCHost.net http://www.tlchost.net/ --
[drakelist] TR-4
Many thanks to all of you who responded to my TR-4 questions. I will Post after I've tried and fixed my problem. I've been out of Ham Radio for quite some time. My specialty was DXing. I've always wanted a Drake Radio and am very happy to find a group like this. 73 from Ice-Cold PA. Fred AI5I -- Submissions:[EMAIL PROTECTED] Subscribe: [EMAIL PROTECTED] - subscribe drakelist in body Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Brought to you courtesy of TLCHost.net http://www.tlchost.net/ --
Re: [drakelist] Static protection
Drake used a Xicon CG90L Gas Discharge tube across the RFC that is across one of the rear panel antenna jacks. This was included in later TR-7's, and was added as an upgrade in early units sent in for repair. Mouser has them for around $3.00. 73, Garey - K4OAH Atlanta Sterling Garwood wrote: I have a very nice TR-7/R-7 pair and I want to install some protection on the input of the TR-7 to protect from static etc.. anyone got suggestions of product and/or supplier ??? -- Submissions:[EMAIL PROTECTED] Subscribe: [EMAIL PROTECTED] - subscribe drakelist in body Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Brought to you courtesy of TLCHost.net http://www.tlchost.net/ --
[drakelist] TR7 PIN Diode Replacement
HI all: Thought I'd pass on my recent experience in replacing the PIN diodes. This applies particularly to those who are using the MA4P1200's from DownEast Microwave as replacements for the UM9401's. Nothing wrong with these 50 watt PIN diodes for replacing the three on the rear of the two HPF boards, but I.D.'ing the cathode end is not intuitive. I have used these before some time ago but when I went to do this classic repair on a friend's TR7, I just assumed the diodes were the basic black body and the cathode stripe was the blue end. WRONG! They are a blue body with a black stripe! Trouble is the blue and the black parts are 50/50 on the body of the diode and even under a magnifier could not make out what was "original body color" and what was "stripe". After installing them, and finding the rig not working yet, I checked other MA4P1200's I had with an ohmmeter and determined the black end is the cathode. A call this a.m. to Steve and Sandra at DEM confirmed, after even they had to do some thinking about it, the BLACK end is the cathode. To repeatthe diode has a blue body with a black stripe. Might as well add some other notes here for those not familiar with this process while I am at it With the the rig upright and facing you, and the HPF boards on your left, the MA4P1200's (UM9401's) on the rear of the two HPF boards are positioned as follows: Single one in tx line is cathode down. It's just to the right and slightly above the 1 watt 82 ohm resistor. The other two in the rx line are cathode facing left. On later TR7's, and I don't know where the serial # cutoff is, they are horizontally positioned in a line, below and right of the 1 watt resistor. I have 3 service manuals here that all show these positioned vertically with a cap soldered above the board to one of the leads. I have yet to come across a TR7 wired like this. Maybe someone else can shed some light on the early serial # PIN diode placement. The picture of this board in my service manuals are quite dark and it is not easy to see the PIN diodes. The front HPF board has the two "transistor looking" (but with only two leads) PIN diodes. Flat side of these are both on the left side as you face the front of the rig - this is cathode down. Interestingly after replacing all of the PIN diodes in this rig, and correcting the polarity on the rear ones after goofing up, it still did not work. Turned out the .05 rx coupling cap, C1504, was open somehow! No signals would pass through it, or at least none to speak of. Someone else had worked on this rig before me and there were several extra caps not on the schematic, some caps that were on the board had been removed and not replaced, small signal diodes had been tack soldered above the board in place of the PIN diodes, and there were "extra" diodes that "went nowhere"! One of the front HPF board PIN diodes fell out on its own when I went to unsolder it, before the soldering iron got near it! I am happy to report it now works, is essentially back to stock, and it just needs a good tune-up to finish it off. I find that a dental pick helps clear the holes for re-installing the diodes, and a hemostat helps hold the parts for insertion. It isn't easy to solder the parts back in without the rather involved process of removing the boards entirely but it can be done if care (and minimal solder) is used. A dental mirror and flashlight make inspecting the board for solder bridges easy. Lastly, your mileage may vary. I freely admit I am a "technician-in-training" - if I have made any errors in this post, please tell me before I send others the wrong direction. That said, there is nothing quite like fixing your own. My wife is addicted to crossword puzzles - I detest the things, but I think solving a rig's problems step by step yield a similar sort of satisfaction. 73 Peter VE3AX -- Submissions:[EMAIL PROTECTED] Subscribe: [EMAIL PROTECTED] - subscribe drakelist in body Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Brought to you courtesy of TLCHost.net http://www.tlchost.net/ --
Re: [drakelist] tr7 oscillation, predrivers blown.. My drake b-line twins are laughing!!!
Hello Craig and group, I had problems with oscillation on my TR7. Setting the predriver to minimum gain did not help so I removed R2209 which is in parallel with the gain pot of the predriver. (I have board #2 with one MRF476). This further reduced gain and my problem was solved. I am still getting full output power so gain is still enough. Concerning your driver board, I doubt that the two transistors (SRF2281) must be matched because they are not in parallel but one after the other. Check if reducing your driver gain changes something. There might be a similar problem just like described above. 73, Dieter DL5RDO > Hello, > I remember why I like tubes now.. :>) > My tr7 failed one night when I turned it on. It had been performing fine > with no apparent problems. I noticed that output power was down (all > other functions are ok), then as I continued troubleshooting (checking > feedlines etc), it went into oscillation even when unkeyed. We have been > tinkering with it, and it appears to start oscillating when we key it (and > unkey)after replacing the drivers with a set similar to what was in it. > Question: Are these supposed to be a matched set (mrf475)? And, will the > pin diodes everyone refers to in the high pass filter cause oscillation? > The set (predrivers) that was in it, was not a matched set (not mrf475 or > drake stock), and they were not high quality (someone had replaced them > before, and done it poorly). The rig did work for quite a while (2 > years).. so maybe a matching pair wasn't critical. Looking for thoughts. > My service manual doesn't do step by step troubleshooting.. > thanks, > Craig > kc5pgz > -- > Submissions:[EMAIL PROTECTED] > Subscribe: [EMAIL PROTECTED] - subscribe drakelist in > body > Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in > body > Hopelessly Lost:[EMAIL PROTECTED] - help in body of message > Brought to you courtesy of TLCHost.net http://www.tlchost.net/ > -- -- Submissions:[EMAIL PROTECTED] Subscribe: [EMAIL PROTECTED] - subscribe drakelist in body Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Brought to you courtesy of TLCHost.net http://www.tlchost.net/ --
[drakelist] 4 line mic plugs
Is there some supplier that sell the 4 line mic plugs? Dan
Re: [drakelist] 4 line mic plugs
Mouser has the Switchcraft straight (S-260), or right angle (S-230) versions in stock. 73, Garey - K4OAH Atlanta DAN COTSIRILOS wrote: Is there some supplier that sell the 4 line mic plugs? Dan -- Submissions:[EMAIL PROTECTED] Subscribe: [EMAIL PROTECTED] - subscribe drakelist in body Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Brought to you courtesy of TLCHost.net http://www.tlchost.net/ --
Re: [drakelist] 4 line mic plugs
THANKS EVERYONE I SEE THAT MOUSER HAS THEM, DAN - Original Message - From: "Garey Barrell" <[EMAIL PROTECTED]> To: "DAN COTSIRILOS" <[EMAIL PROTECTED]> Cc: <[EMAIL PROTECTED]> Sent: Monday, February 02, 2004 4:49 PM Subject: Re: [drakelist] 4 line mic plugs > Mouser has the Switchcraft straight (S-260), or right angle (S-230) versions in > stock. > > 73, Garey - K4OAH > Atlanta > > > DAN COTSIRILOS wrote: > > > Is there some supplier that sell the 4 line mic plugs? Dan > > -- Submissions:[EMAIL PROTECTED] Subscribe: [EMAIL PROTECTED] - subscribe drakelist in body Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Brought to you courtesy of TLCHost.net http://www.tlchost.net/ --
Re: [drakelist] 4 line mic plugs
Newark usually has them, Dan. They are Switchcraft too! 73, Don, WB5HAK
[drakelist] TR-7 mic plug wiring scheme needed
Hi Drakesters, As you may recall, my T-4XC has been mod'd with a 4-pin plug in place of the original .210" jack. I have been informed by the previous owner that he doesn't recall the exact wiring, but does recall it matches whatever the TR7 has as he used a Shure 444 with both models. I don't have a TR7 schematic handy anymore, so can someone tell me the correct matching of a D-104 to this jack and what the plug pin numbering is relative to the indent on the jack? tnx es 73, Casey, KS7J -- Submissions:[EMAIL PROTECTED] Subscribe: [EMAIL PROTECTED] - subscribe drakelist in body Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Brought to you courtesy of TLCHost.net http://www.tlchost.net/ --
Re: [drakelist] 4 line mic plugs
In the mouser catalog, I only see the 502-S-260 (3-conductor straight). Don't see any right-angled S-230 (0.206 diam.) plugs. Are they special purchase or something? 73 Mark, N5KAE - Original Message - From: "DAN COTSIRILOS" <[EMAIL PROTECTED]> To: "Garey Barrell" <[EMAIL PROTECTED]> Cc: <[EMAIL PROTECTED]> Sent: Monday, February 02, 2004 4:51 PM Subject: Re: [drakelist] 4 line mic plugs > > THANKS EVERYONE I SEE THAT MOUSER HAS THEM, DAN > - Original Message - > From: "Garey Barrell" <[EMAIL PROTECTED]> > To: "DAN COTSIRILOS" <[EMAIL PROTECTED]> > Cc: <[EMAIL PROTECTED]> > Sent: Monday, February 02, 2004 4:49 PM > Subject: Re: [drakelist] 4 line mic plugs > > > > Mouser has the Switchcraft straight (S-260), or right angle (S-230) > versions in > > stock. > > > > 73, Garey - K4OAH > > Atlanta > > > > > > DAN COTSIRILOS wrote: > > > > > Is there some supplier that sell the 4 line mic plugs? Dan > > > > > > > -- > Submissions:[EMAIL PROTECTED] > Subscribe: [EMAIL PROTECTED] - subscribe drakelist in body > Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body > Hopelessly Lost:[EMAIL PROTECTED] - help in body of message > Brought to you courtesy of TLCHost.net http://www.tlchost.net/ > -- > -- Submissions:[EMAIL PROTECTED] Subscribe: [EMAIL PROTECTED] - subscribe drakelist in body Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Brought to you courtesy of TLCHost.net http://www.tlchost.net/ --
[drakelist] Address
Pardon the bandwidth - Pete, I forgot to add your address to my book - please drop me a note. Mike -- Submissions:[EMAIL PROTECTED] Subscribe: [EMAIL PROTECTED] - subscribe drakelist in body Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Brought to you courtesy of TLCHost.net http://www.tlchost.net/ --
[drakelist] TR-4C box
What should a guy do with a TR-4C cardboard box with the round foam corner supports? I have one in my garage taking up space. Michael N0XY -- Submissions:[EMAIL PROTECTED] Subscribe: [EMAIL PROTECTED] - subscribe drakelist in body Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Brought to you courtesy of TLCHost.net http://www.tlchost.net/ --
Re: [drakelist] 4 line mic plugs
Mark, I don't have a paper copy of the Mouser catalog but here is a direct link below to the online Mouser catalog for the Switchcraft "Drake .206" Right Angle plug. http://www.mouser.com/index.cfm?handler=displayproduct&lstdispproductid=374794&e_categoryid=51&e_pcodeid=50203 Have Fun, Brian - NXØX Duluth, MN.
Re: [drakelist] 4 line mic plugs
Thanks. I kinda figured it just wasn't in the paper version. I just got it a couple days ago. 73, and keep those cathodes emitting, Mark N5KAE - Original Message - From: [EMAIL PROTECTED] To: [EMAIL PROTECTED] ; [EMAIL PROTECTED] Sent: Monday, February 02, 2004 8:15 PM Subject: Re: [drakelist] 4 line mic plugs Mark,I don't have a paper copy of the Mouser catalog but here is a direct link below to the online Mouser catalog for the Switchcraft "Drake .206" Right Angle plug.http://www.mouser.com/index.cfm?handler=displayproduct&lstdispproductid=374794&e_categoryid=51&e_pcodeid=50203 Have Fun,Brian - NXØXDuluth, MN.
Re: [drakelist] 4 line mic plugs
Mark - Just do a search on S230, and select Switchcraft. Shown as "In Stock". 73, Garey - K4OAH Atlanta Mark Nace wrote: In the mouser catalog, I only see the 502-S-260 (3-conductor straight). Don't see any right-angled S-230 (0.206 diam.) plugs. Are they special purchase or something? 73 Mark, N5KAE -- Submissions:[EMAIL PROTECTED] Subscribe: [EMAIL PROTECTED] - subscribe drakelist in body Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Brought to you courtesy of TLCHost.net http://www.tlchost.net/ --
