Re: [Repeater-Builder] 600 - 10k ohm Interface
Thanks everyone, I think I have a number of ideas to try. The unit has a transformer inside, 600/600ohm, the output is floating, so live and ground should be able to be connected across the output. The TX has the same transformer 600/600ohm, but the controller to the TX is a 600ohm line anyway, so it should be fine (by my understanding) For those interested the units are Tait Repeater modules. The reason for the request, was the matching, and also I have one receiver that has bag DTMF twist, falsing. Unable to use DMTF blanking, as it does it so much with voices. Have setup the radio/controller as required, and tested. Thought a impedance mis-match. Regards Kevin. - Original Message - From: John J. Riddell To: Repeater-Builder@yahoogroups.com Sent: Monday, December 13, 2004 2:30 PM Subject: Re: [Repeater-Builder] 600 - 10k ohm Interface Kevin, I just built one here for our Church for a DVD player, "Stereo" to an 10 K input on a "Mono" amp. You can use half of whatI did.. From the 600 ohm OP put a 4.7K resistor to the top of a 5 K trim pot. The bottom of the trim pot goes to ground. From the centre of the trim pot put a 4.7 K resistor to the 10 K input. Adjust the pot for the desired level going in to the 10 K input and it works very well. Since you are using resistors there is no freq. roll off. A 600 to 10K transformer would also do but they are expensive these days for anything that is quality 73 John VE3AMZ - Original Message - From: Kevin Natalia To: Repeaters Users Group ; Repeater Builder Users Group Sent: Sunday, December 12, 2004 6:14 PM Subject: [Repeater-Builder] 600 - 10k ohm Interface Hi All, I need a simple interface for a 600 ohm output radio to a controller which accepts 10k ohm. This isa RX not TX. I don't want to make a circuit board if I don't need to. Any ideas? Regards Kevin. Yahoo! Groups Links To visit your group on the web, go to:http://groups.yahoo.com/group/Repeater-Builder/ To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
RE: [Repeater-Builder] 600 - 10k ohm Interface
try this company www.sescom.com they have audio transformers for any audio application Bill, N3JBX"Richard W. Solomon" [EMAIL PROTECTED] wrote: Way back when, we just used a 6 vac fil xfmr. Worked pretty fair as I recall. You can always get fancy later. 73, Dick, W1KSZ -Original Message-From: Kevin Natalia [mailto:[EMAIL PROTECTED]Sent: Sunday, December 12, 2004 6:14 PMTo: Repeaters Users Group; Repeater Builder Users GroupSubject: [Repeater-Builder] 600 - 10k ohm Interface Hi All, I need a simple interface for a 600 ohm output radio to a controller which accepts 10k ohm. This isa RX not TX. I don't want to make a circuit board if I don't need to. Any ideas? Regards Kevin. Do you Yahoo!? The all-new My Yahoo! What will yours do? Yahoo! Groups Links To visit your group on the web, go to:http://groups.yahoo.com/group/Repeater-Builder/ To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
RE: [Repeater-Builder] 600 - 10k ohm Interface
Way back when, we just used a 6 vac fil xfmr. Worked pretty fair as I recall. You can always get fancy later. 73, Dick, W1KSZ -Original Message-From: Kevin Natalia [mailto:[EMAIL PROTECTED]Sent: Sunday, December 12, 2004 6:14 PMTo: Repeaters Users Group; Repeater Builder Users GroupSubject: [Repeater-Builder] 600 - 10k ohm Interface Hi All, I need a simple interface for a 600 ohm output radio to a controller which accepts 10k ohm. This isa RX not TX. I don't want to make a circuit board if I don't need to. Any ideas? Regards Kevin. Yahoo! Groups Links To visit your group on the web, go to:http://groups.yahoo.com/group/Repeater-Builder/ To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
RE: [Repeater-Builder] 600 - 10k ohm Interface
John's
correct..a low impedance output will usually drive a higher impedance input
withno problem...try it and see if it works,
Kevin.
The
reverse (high impedance output driving low impedance input) requires more
"engineering" .like a cheap audio transformer ?
Ron
WW8RR
-Original Message-From: WD7F - John in Tucson
[mailto:[EMAIL PROTECTED]Sent: Sunday, December 12, 2004 7:04
PMTo: Repeater-Builder@yahoogroups.comSubject: Re:
[Repeater-Builder] 600 - 10k ohm Interface
You guys are all purists. Hook it up and
see if it works.
de WD7F
John in Tucson
- Original Message -
From:
Chuck Kelsey
To: Repeater-Builder@yahoogroups.com
Sent: Sunday, December 12, 2004 4:47
PM
Subject: Re: [Repeater-Builder] 600 -
10k ohm Interface
I believe Radio Shack sells a matching
transformer that will work.
Chuck
WB2EDV
- Original Message -
From:
Kevin
Natalia
To: Repeaters Users Group ; Repeater Builder Users
Group
Sent: Sunday, December 12, 2004 6:14
PM
Subject: [Repeater-Builder] 600 - 10k
ohm Interface
Hi All,
I need a simple interface for a 600 ohm output radio to a controller
which accepts 10k ohm.
This isa RX not TX.
I don't want to make a circuit board if I don't need to.
Any ideas?
Regards
Kevin.
Yahoo! Groups Links
To visit your group on the web, go to:http://groups.yahoo.com/group/Repeater-Builder/
To unsubscribe from this group, send an email to:[EMAIL PROTECTED]
Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
Re: [Repeater-Builder] 600 - 10k ohm Interface
Kevin, In most audio work, 10kohms is considered a bridging impedance. However, it usually is unbalanced while 600 ohms is usually balanced. If the 600 ohm output is from a transformer with neither side grounded, you should be able to simply connect the 10k load directly to the 600 ohm source. If a ground loop exists and hum occurs, then a matching transformer is called for. Radio Shack has them in stock. 73, Eric Lemmon WB6FLY Kevin Natalia wrote: Hi All, I need a simple interface for a 600 ohm output radio to a controller which accepts 10k ohm. This is a RX not TX. I don't want to make a circuit board if I don't need to. Any ideas? Regards Kevin. --- Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
RE: [Repeater-Builder] 600 - 10k ohm Interface
Terminate the 600 Ohm output with a 680 or 570 Ohm resistor then connect to the controller.. This will make the source happy. If it overdrives the controller, add a 4.7K to 10K ohm resistor in series to swamp the input to taste.. I am making an assumption that the controller and the receiver are in close proximity and that line balance is not an issue and isolation is not needed. Ssb From: Richard W. Solomon [mailto:[EMAIL PROTECTED] Sent: Sunday, December 12, 2004 6:47 PM Yahoo! Groups Links To visit your group on the web, go to:http://groups.yahoo.com/group/Repeater-Builder/ To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. --- Incoming mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.809 / Virus Database: 551 - Release Date: 12/9/2004 --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.809 / Virus Database: 551 - Release Date: 12/9/2004
Re: [Repeater-Builder] 600 - 10k ohm Interface
Kevin, I just built one here for our Church for a DVD player, "Stereo" to an 10 K input on a "Mono" amp. You can use half of whatI did.. From the 600 ohm OP put a 4.7K resistor to the top of a 5 K trim pot. The bottom of the trim pot goes to ground. From the centre of the trim pot put a 4.7 K resistor to the 10 K input. Adjust the pot for the desired level going in to the 10 K input and it works very well. Since you are using resistors there is no freq. roll off. A 600 to 10K transformer would also do but they are expensive these days for anything that is quality 73 John VE3AMZ - Original Message - From: Kevin Natalia To: Repeaters Users Group ; Repeater Builder Users Group Sent: Sunday, December 12, 2004 6:14 PM Subject: [Repeater-Builder] 600 - 10k ohm Interface Hi All, I need a simple interface for a 600 ohm output radio to a controller which accepts 10k ohm. This isa RX not TX. I don't want to make a circuit board if I don't need to. Any ideas? Regards Kevin. Yahoo! Groups Links To visit your group on the web, go to:http://groups.yahoo.com/group/Repeater-Builder/ To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
Re: [Repeater-Builder] 600 - 10k ohm Interface
Simplest way is with a standart 600 to 10k transformer. Kevin Natalia wrote: Hi All, I need a simple interface for a 600 ohm output radio to a controller which accepts 10k ohm. This is a RX not TX. I don't want to make a circuit board if I don't need to. Any ideas? Regards Kevin. *Yahoo! Groups Links* * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service http://docs.yahoo.com/info/terms/. Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] 600 - 10k ohm Interface
--- Kevin Natalia [EMAIL PROTECTED] wrote: Hi All, I need a simple interface for a 600 ohm output radio to a controller which accepts 10k ohm. This is a RX not TX. I don't want to make a circuit board if I don't need to. Any ideas? Just hang a resistor of about 600 ohms across the radio output and connect the input to the controller to it. If you have enough voltage to drive the controler you do not normally need to worry about matching the impedances. __ Do you Yahoo!? All your favorites on one personal page Try My Yahoo! http://my.yahoo.com Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] 600 - 10k ohm Interface
You guys are all purists. Hook it up and see if it works. de WD7F John in Tucson - Original Message - From: Chuck Kelsey To: Repeater-Builder@yahoogroups.com Sent: Sunday, December 12, 2004 4:47 PM Subject: Re: [Repeater-Builder] 600 - 10k ohm Interface I believe Radio Shack sells a matching transformer that will work. Chuck WB2EDV - Original Message - From: Kevin Natalia To: Repeaters Users Group ; Repeater Builder Users Group Sent: Sunday, December 12, 2004 6:14 PM Subject: [Repeater-Builder] 600 - 10k ohm Interface Hi All, I need a simple interface for a 600 ohm output radio to a controller which accepts 10k ohm. This isa RX not TX. I don't want to make a circuit board if I don't need to. Any ideas? Regards Kevin. Yahoo! Groups Links To visit your group on the web, go to:http://groups.yahoo.com/group/Repeater-Builder/ To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
Re: [Repeater-Builder] 600 - 10k ohm Interface
Well, memory was incorrect. Radio Shack does not have anything that close. They have 1K CT to 8 ohm and another 1:1 for 600-900 ohms. As far as being a purist, I was assuming that it was already tried and didn't work well. Chuck WB2EDV - Original Message - From: WD7F - John in Tucson To: Repeater-Builder@yahoogroups.com Sent: Sunday, December 12, 2004 7:04 PM Subject: Re: [Repeater-Builder] 600 - 10k ohm Interface You guys are all purists. Hook it up and see if it works. de WD7F John in Tucson - Original Message - From: Chuck Kelsey To: Repeater-Builder@yahoogroups.com Sent: Sunday, December 12, 2004 4:47 PM Subject: Re: [Repeater-Builder] 600 - 10k ohm Interface I believe Radio Shack sells a matching transformer that will work. Chuck WB2EDV Yahoo! Groups Links To visit your group on the web, go to:http://groups.yahoo.com/group/Repeater-Builder/ To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
Re: [Repeater-Builder] 600 - 10k ohm Interface
I believe Radio Shack sells a matching transformer that will work. Chuck WB2EDV - Original Message - From: Kevin Natalia To: Repeaters Users Group ; Repeater Builder Users Group Sent: Sunday, December 12, 2004 6:14 PM Subject: [Repeater-Builder] 600 - 10k ohm Interface Hi All, I need a simple interface for a 600 ohm output radio to a controller which accepts 10k ohm. This isa RX not TX. I don't want to make a circuit board if I don't need to. Any ideas? Regards Kevin. Yahoo! Groups Links To visit your group on the web, go to:http://groups.yahoo.com/group/Repeater-Builder/ To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
