[ARC5] First Post and Questions

[Brian]

Hello Bobby,

The tower is in fact the RF PA Tank coil. At the chassis end of that tank coil is a variable coupling arrangement. The ferrite piece that is loose is meant to be anchored in place at the top of the tank coil by a three-legged ‘spider’ arrangement; there should be threaded holes to accept small 3/48 (as I recall) screws to hold that ferrite in place. Its purpose is to increase the inductance of the tank coil, not the coupling coil.

73 de Brian, VK2GCE.

On Tuesday, July 04, 2017 6:40 AM, you said:

<snip>
There is one other thing that I have just noticed and have concerns about right now.  There is something loose inside the ceramic "tower" that the 1625s plates are connected to. This tower is part of the 1625's tank circuit as best I can tell.   It appears that there is a ferrite material that fits inside the coupling coil assembly.  This ferrite material is loose and rattles around if you pick up the transmitter and shake it.  It can drop completely out of the coupling assembly under the right conditions.

This is just a guess, but I think the ferrite material belongs inside the coupler (not something that accidentally fell into the "tower" and is used to increase the inductance of the coupling coil.

Does anyone know if I am correct?   If so, what was and what is now normally used to secure the ferrite material to the inside of the coupler?

73 de AK4JA
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