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Brian G,
Your amplifier needs an adjustable/tunable input added. Search the forum for information. I believe I posted a thread about a Palomar Skipper 300 (1-8950 driving 3-8950's) a couple years ago showing the input tuning modification to the Skipper. Yes, It is not your PAL 750B but what the radio "sees" first when keyed is 1 8950 tube-as your amp is configured (1-8950 driving 2-8950's driving 6-8950's) I would think that the dimensions of the coil and capacitor would be very close.
When this amplifier was originally made (Early 1970's I suspect) the vast majority of CB's had tube final output sections. SWR was "not important" to the tube output sections. They would tolerate a 3:1 SWR with no sweat. So a tunable input was not included with all "Factory" amplifiers. (Cost cutting mode even then)

Transistor final output sections, as you have discovered, fail to see the humor in a 3:1 SWR.

I cannot agree more with BJ radionut's statement that

Good Luck

73
David

<blockquote data-quote="Dmans" data-source="post: 766435" data-attributes="member: 49046">Brian G,Your amplifier needs an adjustable/tunable input added. Search the forum for information. I believe I posted a thread about a Palomar Skipper 300 (1-8950 driving 3-8950&#039;s) a couple years ago showing the input tuning modification to the Skipper. Yes, It is not your PAL 750B but what the radio &quot;sees&quot; first when keyed is 1 8950 tube-as your amp is configured (1-8950 driving 2-8950&#039;s driving 6-8950&#039;s) I would think that the dimensions of the coil and capacitor would be very close.When this amplifier was originally made (Early 1970&#039;s I suspect) the vast majority of CB&#039;s had tube final output sections. SWR was &quot;not important&quot; to the tube output sections. They would tolerate a 3:1 SWR with no sweat. So a tunable input was not included with all &quot;Factory&quot; amplifiers. (Cost cutting mode even then)Transistor final output sections, as you have discovered, fail to see the humor in a 3:1 SWR.<img src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f60f.png" class="smilie smilie--emoji" loading="lazy" width="64" height="64" alt=":sneaky:" title="Sneaky&nbsp; &nbsp; :sneaky:"&nbsp; data-smilie="25"data-shortname=":sneaky:" />I cannot agree more with BJ radionut&#039;s statement thatGood Luck73David</blockquote>

[QUOTE="Dmans, post: 766435, member: 49046"] Brian G, Your amplifier needs an adjustable/tunable input added. Search the forum for information. I believe I posted a thread about a Palomar Skipper 300 (1-8950 driving 3-8950's) a couple years ago showing the input tuning modification to the Skipper. Yes, It is not your PAL 750B but what the radio "sees" first when keyed is 1 8950 tube-as your amp is configured (1-8950 driving 2-8950's driving 6-8950's) I would think that the dimensions of the coil and capacitor would be very close. When this amplifier was originally made (Early 1970's I suspect) the vast majority of CB's had tube final output sections. SWR was "not important" to the tube output sections. They would tolerate a 3:1 SWR with no sweat. So a tunable input was not included with [B]all[/B] "Factory" amplifiers. (Cost cutting mode even then) Transistor final output sections, as you have discovered, fail to see the humor in a 3:1 SWR.:sneaky: I cannot agree more with BJ radionut's statement that Good Luck 73 David [/QUOTE]

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