BLIND-HAMS Archives

For blind ham radio operators

BLIND-HAMS@LISTSERV.ICORS.ORG

Options: Use Forum View

Use Monospaced Font
Show Text Part by Default
Condense Mail Headers

Message: [<< First] [< Prev] [Next >] [Last >>]
Topic: [<< First] [< Prev] [Next >] [Last >>]
Author: [<< First] [< Prev] [Next >] [Last >>]

Print Reply
Mime-Version:
1.0
Content-Type:
text/plain; charset="us-ascii"; format=flowed
Date:
Sun, 23 Feb 2014 10:40:33 -0600
Reply-To:
For blind ham radio operators <[log in to unmask]>
Subject:
From:
Pat Byrne <[log in to unmask]>
In-Reply-To:
Message-ID:
Sender:
For blind ham radio operators <[log in to unmask]>
Parts/Attachments:
text/plain (56 lines)
Tom,
I don't know the particular logistics of making this happen but 
wouldn't the amplifier (keyup) be at a minimum current state?  So, is 
it necessary to switch the amp on and off between characters?  I 
guess QSK wouldn't be possible under those conditions, but it should 
shut up the offensive realy noise.  And this from a guy who has never 
owned an amp.  However, with the hole you were making in the band 
yesterday, I am sure tempted!!
Pat, K9JAUAt 09:16 AM 2/23/2014, you wrote:
>Hi, all.
>
>
>
>Well, I'd now like to tap into the wisdom of the group on an issue I don't
>know a whole lot about, so please bare with me.
>
>
>
>As I think many of you know, I use an Ameritron AL811H tube-type amplifier
>with my TS590 HF setup.  I also have an ARB704 buffer box in the circuit, to
>protect the relay circuit in the TS590.
>
>
>
>I'm actually very happy with the setup, although tuning the amp can be a bit
>tricky at times, even with the TW1.
>
>
>
>Anyway, the AL811H has a relay circuit that is rather noisy when keying and
>unkeying.  This is apparent on SSB, and even more apparent on CW.  In fact,
>the noisy relay circuit is one of the main reasons I don't like to use the
>amp when in CW mode, due to the constant and rather annoying relay chatter.
>
>
>
>My question is this:  Do solid-state amplifiers have relay circuits in them
>that are as noisy, or do they tend to be quieter?
>
>
>
>There is no way I have the money in my budget right now to purchase a solid
>state amp, since I believe they can run into the thousands of dollars, but
>I'm wondering if this might be something for me to think about in the long
>term?
>
>
>
>I'm looking forward to all of your observations and suggestions.
>
>
>
>Tom Behler:  KB8TYJ
>
>

ATOM RSS1 RSS2