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 <[email protected]> wrote:
From: Steve Wedge <[email protected]>
Subject: Re: The de-modded R-4B Lives!
To: "Bob Loving" <[email protected]>
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 <[email protected]> wrote:
From: Steve Wedge <[email protected]>
Subject: Re: The de-modded R-4B Lives!
To: "Bob Loving" <[email protected]>
Cc: "Drakelist" <[email protected]>
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: [email protected]
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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