My comment is in regards to discussion in his group.?
Dr.?William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ ? Owner - Operator Big Signal Ranch ¨C K9ZC Staunton, Illinois ? Owner ¨C Operator Villa Grand Piton - J68HZ Soufriere, St. Lucia W.I. Rent it:
email:??bill@... ?
toggle quoted message
Show quoted text
On Jan 11, 2018, at 11:31 AM, Alan de G1FXB via Groups.Io < g1fxb@...> wrote:
While I acknowledge the discussion is regarding choice of toroids
for an AMU project.
QRP Labs / Hans, Points out that his LPF design is suitable UP TO 5
watts as supplied in his kits.
See bottom section of the web page
Alan
On 11/01/2018 17:05, K9HZ wrote:
Not sure what brought this on but the teaching point of my post
for those who would otherwise make current, voltage, saturation
calculations for Inductors in RF service and build from them is to
prototype first. ?My recollection in relation to Hans Summers LPF
kits (nothing to do with my tuner design) is that guys are using
them in amplifiers up to 100 watts... and i wonder if they have
had the parts on the bench to really see the limitations of the
filters. ?More clear?
Dr.?William
J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ
PJ2/K9HZ
?
Owner -
Operator
Big Signal
Ranch ¨C K9ZC
Staunton,
Illinois
?
Owner ¨C
Operator
Villa
Grand Piton - J68HZ
Soufriere,
St. Lucia W.I.
Rent it:
email:??bill@...
?
On Jan 11, 2018, at 8:09 AM, Don Cantrell via Groups.Io < nd6t_6@...>
wrote:
Bill, Before you get too invested in small toroids consider
that the tuner must deal with higher currents than an LPF.
Saturation results from current, not power. 100 watts and high
impedance ratios requires larger cores. Best to do the math
before ordering. 73, ND6T
|
This SWR birdge:
? ?
toggle quoted message
Show quoted text
On Thu, Jan 11, 2018 at 10:11 am, Jerry Gaffke wrote:
Perhaps you are thinking of this SWR Bridge?
It is apparently good for up to 100W, intermittent use.
|
Perhaps you are thinking of this SWR Bridge?
It is apparently good for up to 100W, intermittent use.
toggle quoted message
Show quoted text
On Thu, Jan 11, 2018 at 09:05 am, K9HZ wrote:
My recollection in relation to Hans Summers LPF kits (nothing to do with my tuner design) is that guys are using them in amplifiers up to 100 watts...
|
Re: uBitx receive working...transmit debugging help needed
Jim - thank you - I validated the antenna wiring and it appears good.? I'm also seeing good output on CW (as opposed to SSB voice), so I think that proves out the antenna connection.
|
Re: uBitx receive working...transmit debugging help needed
Further update...I dont have a telegraph key, but I used a jumper to (momentarily) ground the cw key connector.? I got cw tone in the speaker AND over 5 watts output indicated on the MFJ meter.??
Is it safe to say that its more likely I'm having a problem with the microphone than the relays?? CW output appears to travel across the same relays as SSB voice.? I have an oscilloscope and multimeter...is there a simple test I could do to see if I have a bad microphone element?
|
Re: uBitx receive working...transmit debugging help needed
Perhaps , difficult to know whether relays are working .
?Can we have a small led on the relay drive circuit to indicate atleast drive status of the relay. Whether it is operating or not has to be seen . if a spare contact would be there it could light up an LED. regards
?sarma
?vu3zmv
On Thu, Jan 11, 2018 at 7:53 PM, Jim Sheldon <w0eb@...> wrote: Make sure you have the black wire on the antenna connected to ground and NOT the brown one.? Also make sure that the RF output plug is wired properly so that the black wire actually does go to the ground side of the header plug.
Jim - W0EB
|
Re: AE7EU Top Level PCB Mod
Yes, that is the
application note on the Max part.? That is what they designed
the part for.
I followed its
suggestions for settings.? There are several capacitors to
pick.? The main thing is to turn it down, do not overdrive
Bit.? Sp I put the 2K pot on the final output.
AND this lead to yet
another PCB project.?? In BitX I have a PTT board.? It has a
comparitor that senses the small current (a few ma.)? when the
PTT is pushed.? The PTT is just connected to the Max PCB,
connecting it to 5V.
So now I only have 3
wires going to Mic.... Gnd, Mic, +5V.? I can use a cheap 3.5mm
stereo cable from 99 cent store.? I have experimented with
this board and a couple FETs for Pop reduction.? One FET turns
on fast and off slow to mute the LM380.
The other one times
the relay to have it actuate while mute is active.?? Then
there is an inverter that give an +5V to Raduino to be
complient with Allard's PTT signal.
There are 6 3D Printed
ABS parts to the Microphone.? Worked out better than I
expected!
73's
Mike, WA6ISP
On 1/11/2018 9:35 AM, Dave Bottom
wrote:
The MAX9814 Chip.
As commented the gain should be set between the second and
third stage not after to prevent to reduce noise and the chip
has a very well filtered BIAS supply for the Electret Mic so
they are doing everything to make it quiet. .? This works well
with Cell Phones to clear background noise.? We'll see how it
turns out here, but I am using a boom Mic headset with really
good acoustic noise cancellation.? 85 db on train isn't heard
and my F250 Diesel Truck isn't heard either while mobile.?
Drive from audio needs to match levels in the Balanced
Modulator or there will be distortion.? As I said we'll see
how it works here.??
BTW - Nice job on your hand Mic Mike!
Dave WI6R
--
Mike Hagen, WA6ISP
10917 Bryant Street
Yucaipa, Ca. 92399
(909) 918-0058
PayPal ID "MotDog@..."
Mike@...
|
Re: AE7EU Top Level PCB Mod
The MAX9814 Chip.
As commented the gain should be set between the second and third stage not after to prevent to reduce noise and the chip has a very well filtered BIAS supply for the Electret Mic so they are doing everything to make it quiet. .? This works well with Cell Phones to clear background noise.? We'll see how it turns out here, but I am using a boom Mic headset with really good acoustic noise cancellation.? 85 db on train isn't heard and my F250 Diesel Truck isn't heard either while mobile.? Drive from audio needs to match levels in the Balanced Modulator or there will be distortion.? As I said we'll see how it works here.??
BTW - Nice job on your hand Mic Mike!
Dave WI6R
On Thu, Jan 11, 2018 at 7:44 AM, Diver Martin <diver.martin@...> wrote: Dave,
Can you point me towards which chip/board you're going to try out?
|
While I acknowledge the discussion is regarding choice of toroids
for an AMU project.
QRP Labs / Hans, Points out that his LPF design is suitable UP TO 5
watts as supplied in his kits.
See bottom section of the web page
Alan
On 11/01/2018 17:05, K9HZ wrote:
toggle quoted message
Show quoted text
Not sure what brought this on but the teaching point of my post
for those who would otherwise make current, voltage, saturation
calculations for Inductors in RF service and build from them is to
prototype first. ?My recollection in relation to Hans Summers LPF
kits (nothing to do with my tuner design) is that guys are using
them in amplifiers up to 100 watts... and i wonder if they have
had the parts on the bench to really see the limitations of the
filters. ?More clear?
Dr.?William
J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ
PJ2/K9HZ
?
Owner -
Operator
Big Signal
Ranch ¨C K9ZC
Staunton,
Illinois
?
Owner ¨C
Operator
Villa
Grand Piton - J68HZ
Soufriere,
St. Lucia W.I.
Rent it:
email:??bill@...
?
On Jan 11, 2018, at 8:09 AM, Don Cantrell via Groups.Io < nd6t_6@...>
wrote:
Bill, Before you get too invested in small toroids consider
that the tuner must deal with higher currents than an LPF.
Saturation results from current, not power. 100 watts and high
impedance ratios requires larger cores. Best to do the math
before ordering. 73, ND6T
|
Re: uBITx: Encoder without detents
Jack,
Don't think they are "detent-less", not stated in the
description,?but because they are cheap, 10 qty, not afraid to unbend the
top shaft?retention tangs and remove the detent spring as per previous post
and reassemble,? even if I destroy a couple in the process.?I will
post if in fact they are detent-less and?how they work after
modification.?I have disassembled many minature switches and pots?in
the past to lubricate and clean contacts so am not intemidated by a rotary
encoder. Now just to wait on the slow boat!? Who knows they may get here
before my uBitz, hi. hi!
?
Rick, KN4AIE
toggle quoted message
Show quoted text
Rick:
Please let the group know how these
work out, especially if they are truly "detentless".
Jack, W8TEE
From: Rick Price
<rickprice48@...>
To: [email protected]
Sent: Thursday, January 11, 2018 11:10
AM
Subject: Re: [BITX20] uBITx:
Encoder without detents
Jack,
Just
ordered the same type part and quantity?off of EBAY US ? Looks like the
same part but cheaper in US dollars rather than Pounds.
?
Rick, KN4AIE
Why is the US
blacklisted from buying these?
Jack, W8TEE
From: "mike@..."
<mike@...> To: [email protected] Sent: Thursday, January
11, 2018 10:56 AM Subject: Re: [BITX20] uBITx: Encoder
without detents
|
I have and use the qrp-labs LPFs I wouldn't dare go over 10W (and that's pushing it) They are rated for 5w, I don't know where or why anyone would think 100W would be acceptable.
toggle quoted message
Show quoted text
Not sure what brought this on but the teaching point of my post for those who would otherwise make current, voltage, saturation calculations for Inductors in RF service and build from them is to prototype first. ?My recollection in relation
to Hans Summers LPF kits (nothing to do with my tuner design) is that guys are using them in amplifiers up to 100 watts... and i wonder if they have had the parts on the bench to really see the limitations of the filters. ?More clear?
Dr.?William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ
?
Owner - Operator
Big Signal Ranch ¨C K9ZC
Staunton, Illinois
?
Owner ¨C Operator
Villa Grand Piton - J68HZ
Soufriere, St. Lucia W.I.
Rent it:
|
www.villagrandpiton.com
Make our villa your home for an unforgettable stay on St Lucia! Looking for an incredibly romantic spot for your honeymoon or anniversary? Or just need time away from ...
|
email:??bill@...
?
On Jan 11, 2018, at 8:09 AM, Don Cantrell via Groups.Io < nd6t_6@...> wrote:
Bill, Before you get too invested in small toroids consider that the tuner must deal with higher currents than an LPF. Saturation results from current, not power. 100 watts and high impedance ratios requires larger cores. Best to do the math before ordering.
73, ND6T
|
Bill, After Don's comment, I did some googling and came up with the following info. There's so much to learn about this hobby!
?
On Thursday, January 11, 2018 12:05 PM, K9HZ <bill@...> wrote:
Not sure what brought this on but the teaching point of my post for those who would otherwise make current, voltage, saturation calculations for Inductors in RF service and build from them is to prototype first. ?My recollection in relation to Hans Summers LPF kits (nothing to do with my tuner design) is that guys are using them in amplifiers up to 100 watts... and i wonder if they have had the parts on the bench to really see the limitations of the filters. ?More clear?
Dr.?William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ ? Owner - Operator Big Signal Ranch ¨C K9ZC Staunton, Illinois ? Owner ¨C Operator Villa Grand Piton - J68HZ Soufriere, St. Lucia W.I. Rent it:
?
On Jan 11, 2018, at 8:09 AM, Don Cantrell via Groups.Io < nd6t_6@...> wrote: Bill, Before you get too invested in small toroids consider that the tuner must deal with higher currents than an LPF. Saturation results from current, not power. 100 watts and high impedance ratios requires larger cores. Best to do the math before ordering. 73, ND6T
|
Not sure what brought this on but the teaching point of my post for those who would otherwise make current, voltage, saturation calculations for Inductors in RF service and build from them is to prototype first. ?My recollection in relation to Hans Summers LPF kits (nothing to do with my tuner design) is that guys are using them in amplifiers up to 100 watts... and i wonder if they have had the parts on the bench to really see the limitations of the filters. ?More clear?
Dr.?William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ ? Owner - Operator Big Signal Ranch ¨C K9ZC Staunton, Illinois ? Owner ¨C Operator Villa Grand Piton - J68HZ Soufriere, St. Lucia W.I. Rent it:
email:??bill@... ?
toggle quoted message
Show quoted text
On Jan 11, 2018, at 8:09 AM, Don Cantrell via Groups.Io < nd6t_6@...> wrote: Bill, Before you get too invested in small toroids consider that the tuner must deal with higher currents than an LPF. Saturation results from current, not power. 100 watts and high impedance ratios requires larger cores. Best to do the math before ordering. 73, ND6T
|
Re: uBITx: Encoder without detents
Rick:
Please let the group know how these work out, especially if they are truly "detentless".
Jack, W8TEE
From: Rick Price <rickprice48@...>
To: [email protected]
Sent: Thursday, January 11, 2018 11:10 AM
Subject: Re: [BITX20] uBITx: Encoder without detents
Jack,
Just ordered the same type part and quantity?off of EBAY
US ?
Looks like the same part but cheaper in US dollars rather than
Pounds.
?
Rick, KN4AIE
Why is the US blacklisted from
buying these?
Jack, W8TEE
From: "mike@..."
<mike@...> To:
[email protected] Sent:
Thursday, January 11, 2018 10:56 AM Subject: Re: [BITX20] uBITx: Encoder
without detents
|
Re: uBITx: Encoder without detents KNOBS
Looks like the guitar people have all
metal knobs for weighty feel?
I have not seen one over 3/4".? They
come all kinds of finishes, even Chrome.
I like about 1 1/8"?
Mike, WA6ISP
On 1/11/2018 8:11 AM, Michael Hagen
wrote:
I bought these on eBay?
They have detents, UNLESS they state, I don't know how you get
ones without?? Make sure they show the nuts.
Like a post said, "Take em apart, DIY"?
Mike,WA6ISP
On 1/11/2018 8:03 AM, Jack Purdum via
Groups.Io wrote:
Why is the US
blacklisted from buying these?
Jack, W8TEE
--
Mike Hagen, WA6ISP
10917 Bryant Street
Yucaipa, Ca. 92399
(909) 918-0058
PayPal ID "MotDog@..."
Mike@...
--
Mike Hagen, WA6ISP
10917 Bryant Street
Yucaipa, Ca. 92399
(909) 918-0058
PayPal ID "MotDog@..."
Mike@...
|
Re: AE7EU Top Level PCB Mod
The MAX9814 could work well
But be aware that while the AGC will reduce gain when your audio level gets too high,
it will also increase gain when there is nothing but background noise.
So during pauses in speech, your friends will be impressed by the sound of the
apparently monstrous cooling fan required to cool the mighty uBitx.?
Might be worth looking at the SSM2167
? ??http://www.analog.com/media/en/technical-documentation/data-sheets/SSM2167.pdf
You can disable the speech compression feature if that's not what you want.
Still provides AGC style gain reduction when audio levels get too high,
and also reduces gain when audio levels are too low.
Jerry, KE7ER
toggle quoted message
Show quoted text
On Thu, Jan 11, 2018 at 07:51 am, Michael Hagen wrote:
I used the MAX 9814, follow the datasheet suggestions. Set the final output with a pot.
?
|
Re: uBITX Display Separation Cable
I had a couple of spare 8 pin connectors from my Bitx40 that I used for the separation then soldered the other end to a male header and my uBitx is happy.
Bob
N1ETS
|
Re: Micro-BITX ... Lost in post ? Possibly
Mine's just arrived as well, I did get a bit more from the tracking, Royal Mail showed it arriving in the UK just before 6pm yesterday, so it was quick this end, India Post tracking gives the same information, so it and all the rest must have left India on Tiger Moth Airlines, Hi
Nicely packed, looks good, the serial number is F20/1.? This is my first exploration of HF, so now to get it assembled and get an aerial up.
Very will done to Farhan and?all the elves.
73,s David S? G8DJM
|
Re: uBITx: Encoder without detents
I bought these on eBay?
They have detents, UNLESS they state, I don't know how you get
ones without?? Make sure they show the nuts.
Like a post said, "Take em apart, DIY"?
Mike,WA6ISP
On 1/11/2018 8:03 AM, Jack Purdum via
Groups.Io wrote:
Why is the US
blacklisted from buying these?
Jack, W8TEE
--
Mike Hagen, WA6ISP
10917 Bryant Street
Yucaipa, Ca. 92399
(909) 918-0058
PayPal ID "MotDog@..."
Mike@...
|
Re: uBITx: Encoder without detents
Especially because in?the item description, it says "Shipping to US : USPS with the tracking number (10-15 working days)".?
--
Karl Heinz - K5KHK
|
K9HZ
Alan de G1FXB
N8DAH
q q
