|
Hi all, I have tested a mic compressor based on the VOGAD SL6270C (same schematics of its datasheet), and it works very well on the ILER QRPs. However when connected to the ubitx something weird happens. It works the first time I push to talk, I can talk also 5 minutes, and no problem, BUT when I release the PTT and then press again, it does not transmit anything. I did not remove R60 and put an electrolytic cap (the positive towards the ubitx) in the cable connecting the VOGAD and the ubitx. The VOGAD is always powered on via a battery or the same power supply and is DC isolated from the Ubitx. In fact the interconnecting cable also has an isolating transformer to avoid any possible ground loop. Should I really remove R60? Should I remove the DC power of the VOGAD each time I receive? Or should I simply add some polyester caps in parallel at the mic input?
|
What is the supply voltage for the VOGAD board ?
toggle quoted message
Show quoted text
At 25-12-18, you wrote: Hi all, I have tested a mic compressor based on the VOGAD SL6270C (same schematics of its datasheet), and it works very well on the ILER QRPs. However when connected to the ubitx something weird happens. It works the first time I push to talk, I can talk also 5 minutes, and no problem, BUT when I release the PTT and then press again, it does not transmit anything. I did not remove R60 and put an electrolytic cap (the positive towards the ubitx) in the cable connecting the VOGAD and the ubitx. The VOGAD is always powered on via a battery or the same power supply and is DC isolated from the Ubitx. In fact the interconnecting cable also has an isolating transformer to avoid any possible ground loop. Should I really remove R60? Should I remove the DC power of the VOGAD each time I receive? Or should I simply add some polyester caps in parallel at the mic input?
|
12vdc from the battery, but after a resistor and the 7805 is 5vdc.
Il 25/dic/2018 11:37, "Raj vu2zap" < rajendrakumargg@...> ha scritto: What is the supply voltage for the VOGAD board ?
At 25-12-18, you wrote:
>Hi all, I have tested a mic compressor based on the VOGAD SL6270C (same schematics of its datasheet), and it works very well on the ILER QRPs. However when connected to the ubitx something weird happens. It works the first time I push to talk, I can talk also 5 minutes, and no problem, BUT when I release the PTT and then press again, it does not transmit anything. I did not remove R60 and put an electrolytic cap (the positive towards the ubitx) in the cable connecting the VOGAD and the ubitx. The VOGAD is always powered on via a battery or the same power supply and is DC isolated from the Ubitx. In fact the interconnecting cable also has an isolating transformer to avoid any possible ground loop. Should I really remove R60? Should I remove the DC power of the VOGAD each time I receive? Or should I simply add some polyester caps in parallel at the mic input?
|
Check voltages in audio stage and vogad when the audio is gone. That
should tell you
where to look!
At 25-12-18, you wrote:
toggle quoted message
Show quoted text
12vdc from the battery, but
after a resistor and the 7805 is 5vdc.
Il 25/dic/2018 11:37, "Raj vu2zap"
<
rajendrakumargg@...> ha scritto:
- What is the supply voltage for the VOGAD board ?
- At 25-12-18, you wrote:
- >Hi all, I have tested a mic compressor based on the VOGAD SL6270C
(same schematics of its datasheet), and it works very well on the ILER
QRPs. However when connected to the ubitx something weird happens. It
works the first time I push to talk, I can talk also 5 minutes, and no
problem, BUT when I release the PTT and then press again, it does not
transmit anything. I did not remove R60 and put an electrolytic cap (the
positive towards the ubitx) in the cable connecting the VOGAD and the
ubitx. The VOGAD is always powered on via a battery or the same power
supply and is DC isolated from the Ubitx. In fact the interconnecting
cable also has an isolating transformer to avoid any possible ground
loop. Should I really remove R60? Should I remove the DC power of the
VOGAD each time I receive? Or should I simply add some polyester caps in
parallel at the mic input?
|
Actually when it becomes stuck if I wait let's say 20seconds then it works again.
Il 25/dic/2018 12:42, "Raj vu2zap" < rajendrakumargg@...> ha scritto:
Check voltages in audio stage and vogad when the audio is gone. That
should tell you
where to look!
At 25-12-18, you wrote:
12vdc from the battery, but
after a resistor and the 7805 is 5vdc.
Il 25/dic/2018 11:37, "Raj vu2zap"
<
rajendrakumargg@...> ha scritto:
- What is the supply voltage for the VOGAD board ?
- At 25-12-18, you wrote:
- >Hi all, I have tested a mic compressor based on the VOGAD SL6270C
(same schematics of its datasheet), and it works very well on the ILER
QRPs. However when connected to the ubitx something weird happens. It
works the first time I push to talk, I can talk also 5 minutes, and no
problem, BUT when I release the PTT and then press again, it does not
transmit anything. I did not remove R60 and put an electrolytic cap (the
positive towards the ubitx) in the cable connecting the VOGAD and the
ubitx. The VOGAD is always powered on via a battery or the same power
supply and is DC isolated from the Ubitx. In fact the interconnecting
cable also has an isolating transformer to avoid any possible ground
loop. Should I really remove R60? Should I remove the DC power of the
VOGAD each time I receive? Or should I simply add some polyester caps in
parallel at the mic input?
|
- electrolytic cap (the positive towards the ubitx)
what is the value ?
At 25-12-18, you wrote:
Actually when it becomes stuck
if I wait let's say 20seconds then it works again.
Il 25/dic/2018 12:42, "Raj vu2zap"
<
rajendrakumargg@...> ha scritto:
- Check voltages in audio stage and vogad when the audio is gone. That
should tell you
- where to look!
- At 25-12-18, you wrote:
- 12vdc from the battery, but after a resistor and the 7805 is
5vdc.
- Il 25/dic/2018 11:37, "Raj vu2zap"
<
rajendrakumargg@...> ha scritto:
- What is the supply voltage for the VOGAD board ?
- At 25-12-18, you wrote:
- >Hi all, I have tested a mic compressor based on the VOGAD SL6270C
(same schematics of its datasheet), and it works very well on the ILER
QRPs. However when connected to the ubitx something weird happens. It
works the first time I push to talk, I can talk also 5 minutes, and no
problem, BUT when I release the PTT and then press again, it does not
transmit anything. I did not remove R60 and put an electrolytic cap (the
positive towards the ubitx) in the cable connecting the VOGAD and the
ubitx. The VOGAD is always powered on via a battery or the same power
supply and is DC isolated from the Ubitx. In fact the interconnecting
cable also has an isolating transformer to avoid any possible ground
loop. Should I really remove R60? Should I remove the DC power of the
VOGAD each time I receive? Or should I simply add some polyester caps in
parallel at the mic input?
|
toggle quoted message
Show quoted text
Il 25/dic/2018 13:59, "Raj vu2zap" < rajendrakumargg@...> ha scritto:
- electrolytic cap (the positive towards the ubitx)
what is the value ?
At 25-12-18, you wrote:
Actually when it becomes stuck
if I wait let's say 20seconds then it works again.
Il 25/dic/2018 12:42, "Raj vu2zap"
<
rajendrakumargg@...> ha scritto:
- Check voltages in audio stage and vogad when the audio is gone. That
should tell you
- where to look!
- At 25-12-18, you wrote:
- 12vdc from the battery, but after a resistor and the 7805 is
5vdc.
- Il 25/dic/2018 11:37, "Raj vu2zap"
<
rajendrakumargg@...> ha scritto:
- What is the supply voltage for the VOGAD board ?
- At 25-12-18, you wrote:
- >Hi all, I have tested a mic compressor based on the VOGAD SL6270C
(same schematics of its datasheet), and it works very well on the ILER
QRPs. However when connected to the ubitx something weird happens. It
works the first time I push to talk, I can talk also 5 minutes, and no
problem, BUT when I release the PTT and then press again, it does not
transmit anything. I did not remove R60 and put an electrolytic cap (the
positive towards the ubitx) in the cable connecting the VOGAD and the
ubitx. The VOGAD is always powered on via a battery or the same power
supply and is DC isolated from the Ubitx. In fact the interconnecting
cable also has an isolating transformer to avoid any possible ground
loop. Should I really remove R60? Should I remove the DC power of the
VOGAD each time I receive? Or should I simply add some polyester caps in
parallel at the mic input?
|
Change to 1uF .
At 25-12-18, you wrote:
toggle quoted message
Show quoted text
47uF rated at 35v
Il 25/dic/2018 13:59, "Raj vu2zap"
<
rajendrakumargg@...> ha
scritto:
- electrolytic cap (the positive towards the ubitx)
what is the value ?
At 25-12-18, you wrote:
Actually when it becomes stuck if I wait let's say 20seconds then it
works again.
Il 25/dic/2018 12:42, "Raj vu2zap"
<
rajendrakumargg@...> ha scritto:
- Check voltages in audio stage and vogad when the audio is gone. That
should tell you
- where to look!
- At 25-12-18, you wrote:
- 12vdc from the battery, but after a resistor and the 7805 is
5vdc.
- Il 25/dic/2018 11:37, "Raj vu2zap"
<
rajendrakumargg@...> ha scritto:
- What is the supply voltage for the VOGAD board ?
- At 25-12-18, you wrote:
- >Hi all, I have tested a mic compressor based on the VOGAD SL6270C
(same schematics of its datasheet), and it works very well on the ILER
QRPs. However when connected to the ubitx something weird happens. It
works the first time I push to talk, I can talk also 5 minutes, and no
problem, BUT when I release the PTT and then press again, it does not
transmit anything. I did not remove R60 and put an electrolytic cap (the
positive towards the ubitx) in the cable connecting the VOGAD and the
ubitx. The VOGAD is always powered on via a battery or the same power
supply and is DC isolated from the Ubitx. In fact the interconnecting
cable also has an isolating transformer to avoid any possible ground
loop. Should I really remove R60? Should I remove the DC power of the
VOGAD each time I receive? Or should I simply add some polyester caps in
parallel at the mic input?
|
Solved! The blocking cap was too big! I added in series a 0.47uf electrolytic and the problem vanished. I chose that cap because it is a lower value than C60. I don't fully understand it but it works!!!
Il 25/dic/2018 14:21, "iz oos via Groups.Io" <and2oosiz2=[email protected]> ha scritto:
>
> 47uF rated at 35v
>
>
> Il 25/dic/2018 13:59, "Raj vu2zap" <rajendrakumargg@...> ha scritto:
>>>
>>> electrolytic cap (the positive towards the ubitx)
>>
>> what is the value ?
>>
>> At 25-12-18, you wrote:
>>
>>> Actually when it becomes stuck if I wait let's say 20seconds then it works again.
>>>
>>> Il 25/dic/2018 12:42, "Raj vu2zap" < rajendrakumargg@...> ha scritto:
>>> Check voltages in audio stage and vogad when the audio is gone. That should tell you
>>> where to look!
>>>
>>>
>>> At 25-12-18, you wrote:
>>>
>>>> 12vdc from the battery, but after a resistor and the 7805 is 5vdc.
>>>>
>>>> Il 25/dic/2018 11:37, "Raj vu2zap" < rajendrakumargg@...> ha scritto:
>>>> What is the supply voltage for the VOGAD board ?
>>>> At 25-12-18, you wrote:
>>>> >Hi all, I have tested a mic compressor based on the VOGAD SL6270C (same schematics of its datasheet), and it works very well on the ILER QRPs. However when connected to the ubitx something weird happens. It works the first time I push to talk, I can talk also 5 minutes, and no problem, BUT when I release the PTT and then press again, it does not transmit anything. I did not remove R60 and put an electrolytic cap (the positive towards the ubitx) in the cable connecting the VOGAD and the ubitx. The VOGAD is always powered on via a battery or the same power supply and is DC isolated from the Ubitx. In fact the interconnecting cable also has an isolating transformer to avoid any possible ground loop. Should I really remove R60? Should I remove the DC power of the VOGAD each time I receive? Or should I simply add some polyester caps in parallel at the mic input?
>
|
Should be the same value of C60 or is it fine also a lower value 0.47uf?
Il 25/dic/2018 15:05, "Raj vu2zap" < rajendrakumargg@...> ha scritto:
Change to 1uF .
At 25-12-18, you wrote:
47uF rated at 35v
Il 25/dic/2018 13:59, "Raj vu2zap"
<
rajendrakumargg@...> ha
scritto:
- electrolytic cap (the positive towards the ubitx)
what is the value ?
At 25-12-18, you wrote:
Actually when it becomes stuck if I wait let's say 20seconds then it
works again.
Il 25/dic/2018 12:42, "Raj vu2zap"
<
rajendrakumargg@...> ha scritto:
- Check voltages in audio stage and vogad when the audio is gone. That
should tell you
- where to look!
- At 25-12-18, you wrote:
- 12vdc from the battery, but after a resistor and the 7805 is
5vdc.
- Il 25/dic/2018 11:37, "Raj vu2zap"
<
rajendrakumargg@...> ha scritto:
- What is the supply voltage for the VOGAD board ?
- At 25-12-18, you wrote:
- >Hi all, I have tested a mic compressor based on the VOGAD SL6270C
(same schematics of its datasheet), and it works very well on the ILER
QRPs. However when connected to the ubitx something weird happens. It
works the first time I push to talk, I can talk also 5 minutes, and no
problem, BUT when I release the PTT and then press again, it does not
transmit anything. I did not remove R60 and put an electrolytic cap (the
positive towards the ubitx) in the cable connecting the VOGAD and the
ubitx. The VOGAD is always powered on via a battery or the same power
supply and is DC isolated from the Ubitx. In fact the interconnecting
cable also has an isolating transformer to avoid any possible ground
loop. Should I really remove R60? Should I remove the DC power of the
VOGAD each time I receive? Or should I simply add some polyester caps in
parallel at the mic input?
|
Should be OK!
Tomstone R60 and connect direct if you don't want backward
compatability
with the original mic provided.
At 25-12-18, you wrote:
toggle quoted message
Show quoted text
Should be the same value of C60
or is it fine also a lower value 0.47uf?
Il 25/dic/2018 15:05, "Raj vu2zap"
<
rajendrakumargg@...> ha scritto:
- Change to 1uF .
- At 25-12-18, you wrote:
- 47uF rated at 35v
- Il 25/dic/2018 13:59, "Raj vu2zap"
<
rajendrakumargg@...> ha
scritto:
- electrolytic cap (the positive towards the ubitx)
what is the value ?
At 25-12-18, you wrote:
Actually when it becomes stuck if I wait let's say 20seconds then it
works again.
Il 25/dic/2018 12:42, "Raj vu2zap"
<
rajendrakumargg@...> ha scritto:
- Check voltages in audio stage and vogad when the audio is gone. That
should tell you
- where to look!
- At 25-12-18, you wrote:
- 12vdc from the battery, but after a resistor and the 7805 is 5vdc.
- Il 25/dic/2018 11:37, "Raj vu2zap"
<
rajendrakumargg@...> ha scritto:
- What is the supply voltage for the VOGAD board ?
- At 25-12-18, you wrote:
- >Hi all, I have tested a mic compressor based on the VOGAD SL6270C
(same schematics of its datasheet), and it works very well on the ILER
QRPs. However when connected to the ubitx something weird happens. It
works the first time I push to talk, I can talk also 5 minutes, and no
problem, BUT when I release the PTT and then press again, it does not
transmit anything. I did not remove R60 and put an electrolytic cap (the
positive towards the ubitx) in the cable connecting the VOGAD and the
ubitx. The VOGAD is always powered on via a battery or the same power
supply and is DC isolated from the Ubitx. In fact the interconnecting
cable also has an isolating transformer to avoid any possible ground
loop. Should I really remove R60? Should I remove the DC power of the
VOGAD each time I receive? Or should I simply add some polyester caps in
parallel at the mic input?
|
Thanks Raj for your help! I keep R60 installed as I have some electrets I might want to use. I have to say a compressor like this Vogad really helps. As Barry suggested it fits well with the ubitx. It makes a big change with the ILER QRPs too.
Il 25/dic/2018 15:51, "Raj vu2zap" < rajendrakumargg@...> ha scritto:
Should be OK!
Tomstone R60 and connect direct if you don't want backward
compatability
with the original mic provided.
At 25-12-18, you wrote:
Should be the same value of C60
or is it fine also a lower value 0.47uf?
Il 25/dic/2018 15:05, "Raj vu2zap"
<
rajendrakumargg@...> ha scritto:
- Change to 1uF .
- At 25-12-18, you wrote:
- 47uF rated at 35v
- Il 25/dic/2018 13:59, "Raj vu2zap"
<
rajendrakumargg@...> ha
scritto:
- electrolytic cap (the positive towards the ubitx)
what is the value ?
At 25-12-18, you wrote:
Actually when it becomes stuck if I wait let's say 20seconds then it
works again.
Il 25/dic/2018 12:42, "Raj vu2zap"
<
rajendrakumargg@...> ha scritto:
- Check voltages in audio stage and vogad when the audio is gone. That
should tell you
- where to look!
- At 25-12-18, you wrote:
- 12vdc from the battery, but after a resistor and the 7805 is 5vdc.
- Il 25/dic/2018 11:37, "Raj vu2zap"
<
rajendrakumargg@...> ha scritto:
- What is the supply voltage for the VOGAD board ?
- At 25-12-18, you wrote:
- >Hi all, I have tested a mic compressor based on the VOGAD SL6270C
(same schematics of its datasheet), and it works very well on the ILER
QRPs. However when connected to the ubitx something weird happens. It
works the first time I push to talk, I can talk also 5 minutes, and no
problem, BUT when I release the PTT and then press again, it does not
transmit anything. I did not remove R60 and put an electrolytic cap (the
positive towards the ubitx) in the cable connecting the VOGAD and the
ubitx. The VOGAD is always powered on via a battery or the same power
supply and is DC isolated from the Ubitx. In fact the interconnecting
cable also has an isolating transformer to avoid any possible ground
loop. Should I really remove R60? Should I remove the DC power of the
VOGAD each time I receive? Or should I simply add some polyester caps in
parallel at the mic input?
|
The 47uF would be charging via the 10K resistor and that would take a
second or two.
Probably the cap was a little leaky.
Just a guess!
At 25-12-18, you wrote:
toggle quoted message
Show quoted text
Solved! The blocking cap was too
big! I added in series a 0.47uf electrolytic and the problem vanished. I
chose that cap because it is a lower value than C60. I don't fully
understand it but it works!!!
Il 25/dic/2018 14:21, "iz
oos via Groups.Io"
<and2oosiz2=
[email protected]> ha scritto:
>
> 47uF rated at 35v
>
>
> Il 25/dic/2018 13:59, "Raj vu2zap"
<
rajendrakumargg@...> ha scritto:
>>>
>>> electrolytic cap (the positive towards the ubitx)
>>
>> what is the value ?
>>
>> At 25-12-18, you wrote:
>>
>>> Actually when it becomes stuck if I wait let's say 20seconds
then it works again.
>>>
>>> Il 25/dic/2018 12:42, "Raj vu2zap"
<
rajendrakumargg@...> ha scritto:
>>> Check voltages in audio stage and vogad when the audio is
gone. That should tell you
>>> where to look!
>>>
>>>
>>> At 25-12-18, you wrote:
>>>
>>>> 12vdc from the battery, but after a resistor and the
7805 is 5vdc.
>>>>
>>>> Il 25/dic/2018 11:37, "Raj vu2zap"
<
rajendrakumargg@...> ha scritto:
>>>> What is the supply voltage for the VOGAD board ?
>>>> At 25-12-18, you wrote:
>>>> >Hi all, I have tested a mic compressor based on the
VOGAD SL6270C (same schematics of its datasheet), and it works very well
on the ILER QRPs. However when connected to the ubitx something weird
happens. It works the first time I push to talk, I can talk also 5
minutes, and no problem, BUT when I release the PTT and then press again,
it does not transmit anything. I did not remove R60 and put an
electrolytic cap (the positive towards the ubitx) in the cable connecting
the VOGAD and the ubitx. The VOGAD is always powered on via a battery or
the same power supply and is DC isolated from the Ubitx. In fact the
interconnecting cable also has an isolating transformer to avoid any
possible ground loop. Should I really remove R60? Should I remove the DC
power of the VOGAD each time I receive? Or should I simply add some
polyester caps in parallel at the mic input?
|
Raj vu2zap