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PLL

There were 2 major classic models, the MK I with the MB8719 PLL chip, and 3 xtals, and the MK II - MC 145106 PLL and 3 IC's instead. The first version was my favourite, i did alot of work on these radio's years ago when CB was big over here. The MK I had slightly nicer SSB TX audio i always found, and the RX was a little more deaf, the beep was very distinctive too. The MK II was a easier / simpler device to add extra bands on to, had better RX, a much more normal sounding beep too
I used to put crystal IF filters in for the locals, they used to like that. really improves the RX of the MK I too. i would like to pick up one for 10m use sometime, a MK I that is

Nice old set !

<blockquote data-quote="Marcc" data-source="post: 357421" data-attributes="member: 24889">PLLThere were 2 major classic models, the MK I with the MB8719 PLL chip, and 3 xtals, and the MK II - MC 145106 PLL and 3 IC&#039;s instead.&nbsp; The first version was my favourite, i did alot of work on these radio&#039;s years ago when CB was big over here. The MK I had slightly nicer SSB TX audio i always found, and the RX was a little more deaf, the beep was very distinctive too. The MK II was a easier / simpler device to add extra bands on to, had better RX, a much more normal sounding beep too <img src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f642.png" class="smilie smilie--emoji" loading="lazy" width="64" height="64" alt=":)" title="Smile&nbsp; &nbsp; :)"&nbsp; data-smilie="1"data-shortname=":)" />I used to put crystal IF filters in for the locals, they used to like that. really improves the RX of the MK I too. i would like to pick up one for 10m use sometime, a MK I that is <img src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f642.png" class="smilie smilie--emoji" loading="lazy" width="64" height="64" alt=":)" title="Smile&nbsp; &nbsp; :)"&nbsp; data-smilie="1"data-shortname=":)" />Nice old set !</blockquote>

[QUOTE="Marcc, post: 357421, member: 24889"] [b]PLL[/b] There were 2 major classic models, the MK I with the MB8719 PLL chip, and 3 xtals, and the MK II - MC 145106 PLL and 3 IC's instead. The first version was my favourite, i did alot of work on these radio's years ago when CB was big over here. The MK I had slightly nicer SSB TX audio i always found, and the RX was a little more deaf, the beep was very distinctive too. The MK II was a easier / simpler device to add extra bands on to, had better RX, a much more normal sounding beep too :) I used to put crystal IF filters in for the locals, they used to like that. really improves the RX of the MK I too. i would like to pick up one for 10m use sometime, a MK I that is :) Nice old set ! [/QUOTE]

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