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Thanks.

It's definitely the amplifiers preamp.
No issues with Tha Madison and Phantom setup on the Same antenna. The recive/transmitt are fine..
I switched the preamp in the on and off position and what happened now is that the preamp not only works but needs to be left in the on position.
The preamp in the off position drops the recive down to almost nothing and keying then un keying the mic no longer helps. The recive basically get shut down with the preamp in the off position. It must be left in the on position which is strange to say the least. This preamp like most on these old 11 meter tube amps preamplifier option stoped working about two months after it was delivered brand new from the factory. Thanks for the advice. It could've very well been the situation but in this case it's 100% the 300a's preamp causing the issue. Thanks again. 73

<blockquote data-quote="Sonar" data-source="post: 594831" data-attributes="member: 47153">Thanks.&nbsp;It&#039;s definitely the amplifiers preamp.No issues with Tha Madison and Phantom setup on the Same antenna. The recive/transmitt are fine.. I switched the preamp in the on and off position and what happened now is that the preamp not only works but needs to be left in the on position.The preamp in the off position drops the recive down to almost nothing and keying then un keying the mic no longer helps. The recive basically get shut down with the preamp in the off position. It must be left in the on position which is strange to say the least. This preamp like most on these old 11 meter tube amps preamplifier option stoped working about two months after it was delivered brand new from the factory. Thanks for the advice. It could&#039;ve very well been the situation but in this case it&#039;s 100% the 300a&#039;s preamp causing the issue. Thanks again. 73</blockquote>

[QUOTE="Sonar, post: 594831, member: 47153"] Thanks. It's definitely the amplifiers preamp. No issues with Tha Madison and Phantom setup on the Same antenna. The recive/transmitt are fine.. I switched the preamp in the on and off position and what happened now is that the preamp not only works but needs to be left in the on position. The preamp in the off position drops the recive down to almost nothing and keying then un keying the mic no longer helps. The recive basically get shut down with the preamp in the off position. It must be left in the on position which is strange to say the least. This preamp like most on these old 11 meter tube amps preamplifier option stoped working about two months after it was delivered brand new from the factory. Thanks for the advice. It could've very well been the situation but in this case it's 100% the 300a's preamp causing the issue. Thanks again. 73 [/QUOTE]

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