I hate the RCA 630 chassis

[N2IXK]

Originally Posted by Montman

What did you do for the R209? The 5300 segment is open. The connection is on the middle of the three pronges at the top. Is that 5300 + 500 for 5800 ohms since the three top pronges are for the 500 ohms and the connection is on the middle pronge. What value is it? 5300 or 5800 ? And any suggestions for best place to get it.

R209 is 3 series connected sections, 5300, 500, and 500 ohms. The middle tap (default setting) is at 5300+500, or 5800 ohms. Possible settings are 5300 (bottom tap), 5800 (middle tap), or 6300 (top tap). This is the horizontal linearity adjustment.

Could be replaced with a 6.8K 50W adjustable wirewound, set for 5800 ohms. The original is only rated at 25 W, but a modern 50W unit is a closer mechanical fit to the original.