Elecraft

Help with first KPA Transmit Tests

Classic

List

Threaded

6 messages Options

Michael Cook-2

Help with first KPA Transmit Tests

OK, I'm back for more help. I've been building a KPA 100 and I'm at
the part where you are supposed to first test the transmitter by
transmitting into a dummy load and listening on another receiver.

Now the other other receiver I have is a Yaesu VX-7R handy-talkie.
Now I've tuned them both to the same frequency (7.150 khz) and the
VX-7R is an AM mode. When I key the transmitter, the 7R picks it up,
but I can't hear any sound. I've fiddled with the volume and all
that. It breaks squelch, it shows up real strong on the S meter (full
meter). But there is just no sound, I can't hear the CW signal. This
happens at all power levels. I've also tried tuning around a little bit.

Now my theory is that this is my fault, as I've never tried to use
the VX-7R to try to listen to CW before so I'm not sure what I'm
doing is right.

Is my procedure above correct? Is there something else I need to do
(like set a different frequency)?

-- Michael Cook
_______________________________________________
Elecraft mailing list
Post to: [hidden email]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft

Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com

Mark Bayern-2

Re: Help with first KPA Transmit Tests

An AM receiver will not give you any tone when receiving a CW signal.

A CW signal is the same thing as an unmodulated AM carrier. The best
you'll be able to hear would be a 'quiet' spot when tuning across the
signal.

Mark
_______________________________________________
Elecraft mailing list
Post to: [hidden email]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft

Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com

Jack Smith-6

Re: Help with first KPA Transmit Tests

In reply to this post by Michael Cook-2

To hear a beat note when sending CW, your VX-7R will have to be in SSB
or CW mode. When set for AM reception what you are hearing is normal.

Jack

Michael Cook wrote:

> OK, I'm back for more help. I've been building a KPA 100 and I'm at
> the part where you are supposed to first test the transmitter by
> transmitting into a dummy load and listening on another receiver.
>
> Now the other other receiver I have is a Yaesu VX-7R handy-talkie. Now
> I've tuned them both to the same frequency (7.150 khz) and the VX-7R
> is an AM mode. When I key the transmitter, the 7R picks it up, but I
> can't hear any sound. I've fiddled with the volume and all that. It
> breaks squelch, it shows up real strong on the S meter (full meter).
> But there is just no sound, I can't hear the CW signal. This happens
> at all power levels. I've also tried tuning around a little bit.
>
> Now my theory is that this is my fault, as I've never tried to use the
> VX-7R to try to listen to CW before so I'm not sure what I'm doing is
> right.
>
> Is my procedure above correct? Is there something else I need to do
> (like set a different frequency)?
>
> -- Michael Cook
> _______________________________________________
> Elecraft mailing list
> Post to: [hidden email]
> You must be a subscriber to post to the list.
> Subscriber Info (Addr. Change, sub, unsub etc.):
> http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/subscribers.htm
> Elecraft web page: http://www.elecraft.com
>
>

Karl Larsen

Re: Help with first KPA Transmit Tests

Jack Smith wrote:

> To hear a beat note when sending CW, your VX-7R will have to be in SSB
> or CW mode. When set for AM reception what you are hearing is normal.
>
> Jack
>
>
> Michael Cook wrote:
>> OK, I'm back for more help. I've been building a KPA 100 and I'm at
>> the part where you are supposed to first test the transmitter by
>> transmitting into a dummy load and listening on another receiver.
>>
>> Now the other other receiver I have is a Yaesu VX-7R handy-talkie.
>> Now I've tuned them both to the same frequency (7.150 khz) and the
>> VX-7R is an AM mode. When I key the transmitter, the 7R picks it up,
>> but I can't hear any sound. I've fiddled with the volume and all
>> that. It breaks squelch, it shows up real strong on the S meter (full
>> meter). But there is just no sound, I can't hear the CW signal. This
>> happens at all power levels. I've also tried tuning around a little bit.
>>
>> Now my theory is that this is my fault, as I've never tried to use
>> the VX-7R to try to listen to CW before so I'm not sure what I'm
>> doing is right.

I have a VX2-R and it tunes the HF bands but only in the AM mode. In
AM you never hear a beat note. Check your VX7R book and see if you can
change from AM to any other mode. SSB or CW will work fine.

73 Karl

>>
>> Is my procedure above correct? Is there something else I need to do
>> (like set a different frequency)?
>>
>> -- Michael Cook
>> _______________________________________________
>> Elecraft mailing list
>> Post to: [hidden email]
>> You must be a subscriber to post to the list.
>> Subscriber Info (Addr. Change, sub, unsub etc.):
>> http://mailman.qth.net/mailman/listinfo/elecraft Help:
>> http://mailman.qth.net/subscribers.htm
>> Elecraft web page: http://www.elecraft.com
>>
>>
> _______________________________________________
> Elecraft mailing list
> Post to: [hidden email]
> You must be a subscriber to post to the list.
> Subscriber Info (Addr. Change, sub, unsub etc.):
> http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/subscribers.htm
> Elecraft web page: http://www.elecraft.com
>
>

wb2ssb

Re: Help with first KPA Transmit Tests

In reply to this post by Michael Cook-2

Alas, the VX-7R does not support CW or SSB modes.

----- Original Message -----
From: [hidden email] <[hidden email]>
To: Jack Smith <[hidden email]>
Cc: [hidden email] <[hidden email]>; Michael Cook <[hidden email]>
Sent: Sat Aug 12 17:05:30 2006
Subject: Re: [Elecraft] Help with first KPA Transmit Tests

Jack Smith wrote:

I have a VX2-R and it tunes the HF bands but only in the AM mode. In

AM you never hear a beat note. Check your VX7R book and see if you can
change from AM to any other mode. SSB or CW will work fine.

73 Karl

_______________________________________________
Elecraft mailing list
Post to: [hidden email]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft

Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com

------------------------------------------------------------------------------
This email message, including any attachments, is for the sole use of the intended recipient(s) and may contain information that is proprietary, confidential, and exempt from disclosure under applicable law. Any unauthorized review, use, disclosure, or distribution is prohibited. If you have received this email in error please notify the sender by return email and delete the original message. Please note, the recipient should check this email and any attachments for the presence of viruses. The organization accepts no liability for any damage caused by any virus transmitted by this email.
==============================================================================

_______________________________________________
Elecraft mailing list
Post to: [hidden email]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft

Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com

Arie Kleingeld PA3A

RE: Help with first KPA Transmit Tests

Search for a broadcast strong station first, then bring the
transmit-freq near that broadcastfreq, perhaps you can hear a beatnote.

73
Arie PA3A

_______________________________________________
Elecraft mailing list
Post to: [hidden email]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft

Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com