There is indeed dc on the 5kA phones output.
When I plug in a headphone I hear a loud pop (almost to the
level it makes me think it'll be blown).
I asked once why on earth this is needed, and got the answer that
blocking this DC (by transformers or capacitors) would also block
the lowest audio
A capacitor in-line of sufficient rating to handle the voltages to be
encountered and with sufficient capacity to pass the lowest freqs of
interest will turn off your ear heaters. Maybe you want to wire in a
Summer-Winter switch to be able to select cool or warm operation as the
seasons
Yes, this is a very good solution! I had to do something like this but
without the summer/winter switch when I decided to modify an ARC-5 BC453-B
WWII receiver for SDR. It had occurred to me that it would be a good idea
to explain to a local club how easy it was to convert the old radio to
Yes, this is a very good solution! I had to do something like this but
without the summer/winter switch when I decided to modify an ARC-5 BC453-B
WWII receiver for SDR. It had occurred to me that it would be a good idea
to explain to a local club how easy it was to convert the old radio to
I once had a tube type lab grade audio power amp with a switch on both
channels to roll off freqs below 8 Hz for uses such as music so power would
not be wasted in reproducing infra-sonic signals from such as footsteps
vibrating a phono cartridge.
Not sure what benefit audio down in the
A couple of separate answers:
- Capacitors in series do roll off the lows, but if you pick a cap whose
reactance at one octave below the lowest frequency that you wish to be flat
is equal to the reactance (though you can probably get away with simply using
the DC Resistance of the headphonesÂ
On 11/23/2014 08:31 AM, Bill Guyger via FlexRadio wrote:
A couple of separate answers:
- Capacitors in series do roll off the lows, but if you pick a cap whose reactance at one octave
below the lowest frequency that you wish to be flat is equal to the reactance (though
you can probably get
Hi,
I have setup my Flex5000a setup for remote operation (kind-of) using Team
Viewer and Skype.
Almost everything is working great other than getting my voice from Skype
through the VAC and into the radio.
What is working:
- controlling the radio via TeamViewer from the iPad
-
Very dangerous, but that's the they built radios back then. Everything was
open, you could grab a hand full of electrons real easily !
Bill
Sent from my iPhone
On Nov 23, 2014, at 10:45 AM, Chuck Forsberg WA7KGX c...@omen.com wrote:
On 11/23/2014 08:31 AM, Bill Guyger via FlexRadio
Hi Dan-- what are you using to route the audio to/from skype and the
VAC1 port? You must use some external software like Virtual Audio Cable
(v12).
Steve WA7DUH
On 11/23/2014 9:01 AM, Dan Scott wrote:
Hi,
I have setup my Flex5000a setup for remote operation (kind-of) using Team
Viewer
On 11/23/2014 9:19 AM, Patrick Greenlee wrote:
I once had a tube type lab grade audio power amp with a switch on
both channels to roll off freqs below 8 Hz for uses such as music so
power would not be wasted in reproducing infra-sonic signals from
such as footsteps vibrating a phono cartridge.
I think I found my answer and you guys were right...
Quote: The headphone circuitry in the FLEX-5000 uses Output Coupled Load (OCL)
amplifier with a 2.5V bias.
Headphone requirements for the Flex 5000
That sucks, love my earbuds, they're so much better due to weight, but don't
really want to
The 5000a uses an LM4911 in an OCL configuration. See the device data
sheet.
The barrel of the headphone jack IS NOT GROUNDED.
Rather it is biased to half the 4911's supply voltage,
as are the left and right headphone outputs. The barrel
and the stereo headphone outputs all show 2.41 volts
on
Yes VAC 4.11. VAC is used to get the audio to Skype, the reverse direction
is not working.
The setup is:
PowerSDR
VAC2
Driver WDM-KS
Input Virtual Cable 4
Output Virtual Cable 3
(Note I have also used VAC1, cables
14 matches
Mail list logo
