Although it was an interesting exercise - I've decided to keep both jacks mono. I can use an adaptor for my stereo cans and that can sit at the ready.
RS made the answer to this whole thing easy: they didn't have closed-contact stereo jacks but did have mono ones. I really didn't want to order $2 worth of jacks and pay $7 in shipping, so I've taken the coward's way out Steve Wedge, W1ES/4 To be is to do - Socrates To do is to be - Plato Do be do be do. - Sinatra All my computers have my signature with various pearls of wisdom appended thereto. From: Bob Loving Sent: Monday, November 07, 2011 4:14 PM To: Steve Wedge Subject: Re: The de-modded R-4B Lives! I thought the same thing, Steve, but won't that also put the resistors in series with the speaker when phones aren't used? Something to think about especially when the Drake speaker is 4-Ohms! I'll have to ponder this situation with paper and pencil. There might be a special jack that will allow connections that bypass the resistor for speaker and have them in for phones.operation. It's probably an expensive jack! Bob K9JU --- On Mon, 11/7/11, Steve Wedge <w1es1...@earthlink.net> wrote: From: Steve Wedge <w1es1...@earthlink.net> Subject: Re: The de-modded R-4B Lives! To: "Bob Loving" <bob.lov...@sbcglobal.net> Date: Monday, November 7, 2011, 2:08 PM One way to experiment with this is to put about a 8 - 10-ohm resistor in series with each lead. With stereo phones (which are higher Z than 4 ohms anyway) you'd have 8-10 ohms in series with each side. If a mono set was plugged in, the ring would be shorted to the sleeve but the audio output at the ring would be shunted to ground via the resistor.- ergo, no short to ground. I'd use two identical resistors instead of one in the interest of balancing the sides when stereo phones are used. If you had a mono set plugged in, you'd notice a very low signal level and could unplug without causing damage. There - I fixed it :) Steve, W1ES/4 -----Original Message----- From: Bob Loving Sent: Nov 7, 2011 12:29 PM To: Steve Wedge Subject: Re: The de-modded R-4B Lives! As I said, Steve, it was a good idea if you were going to keep the receiver. Take care. Good luck with selling the unit. 73, Bob K9JU --- On Mon, 11/7/11, Steve Wedge <w1es1...@earthlink.net> wrote: From: Steve Wedge <w1es1...@earthlink.net> Subject: Re: The de-modded R-4B Lives! To: "Bob Loving" <bob.lov...@sbcglobal.net> Cc: "Drakelist" <drakelist@zerobeat.net> Date: Monday, November 7, 2011, 11:24 AM Good point, Bob. Now re-thinking the concept. W1ES -----Original Message----- From: Bob Loving Sent: Nov 7, 2011 12:18 PM To: w1es1...@earthlink.net Cc: Drakelist Subject: The de-modded R-4B Lives! Steve, et.al.: I would reconsider using a stereo jack for the front panel "hole filling" unless you are planning to keep the receiver for your use. If you are going to sell the receiver after it is functioning correctly, the next owner may assume the jack is a standard mono jack and plug in a mono 1/4" plug. This will effectively short to chassis (ground) the "ring" connection of the jack. With the "ring" and "tip" connected together, the output of the audio amplifier will be shorted out! Other than this warning, the idea of using a stereo jack is a good one especially in light of the number of stereo headsets available at very reasonable prices in the market. 73, Bob K9JU
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