Re- Bills post: Have you ever wondered why the
old tube type rigs has so much better "Presence"?
He is correct. The tube type rigs had 10 watts or better
audio output, transformer coupled to a large, inefficient
but high quality speaker. Cost and size of gear has reduced
receiver audio to the present stage of very low fidelity.
de KL7HF
----- Original Message -----
From: "Bill Ames" <bames@aob.com>
To: <tentec@contesting.com>
Sent: Monday, January 21, 2002 18:30
Subject: RE: [TenTec] Ten-Tec External Speaker
> I think that TT will provide a speaker that meets the interface
requirements
> for the Jupiter but I am concerned that it will not be as good as it could
> be because, I believe, you get better sound from speakers that are less
> efficient and require some power to get the best results. Since the J has
> limited audio output power it can not drive these less efficient speakers.
I
> do not see them adding any electronics to the new speakers, so, I am
> prepared to be somewhat disappointed...
>
> Bill Ames
> KB1LG
>
> -----Original Message-----
> From: tentec-admin@contesting.com [mailto:tentec-admin@contesting.com]On
> Behalf Of Bob KIrkland
> Sent: Monday, January 21, 2002 10:30 AM
> To: tentec@contesting.com
> Subject: [TenTec] Ten-Tec External Speaker
>
>
> The operations manual for the Jupiter specifies a 4 Ohm speaker should be
> used for external sound. As you know the audio output comes from a
> transistor amplifier. In this type of audio amplifier it is important to
> match the speaker impedance to the output impedance. If it is not
> matched,inefficiency and distortion can occur especially at high volume
> levels, and the amp has only 1 watt to begin with.
> Bob, w5pvr@gower.net
>
>
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