03-10-2026, 10:12 AM
Hi Morzh,
Attached is another pic from John Eng's site. Unfortunately, he does not describe how he cut the stem out of the tube:
+1 on Arran's comments. 1Q5s were a common replacement for WD11s, as they are cheap. 3Q5s should be similar. I had several articles on this in the past but can only find one, here:
In TRF sets like an Aeriola Sr, Radiola 2 or a Radiola 3 (converted for 3V tubes or the 3Q5s wired for 1.5V), the interelectrode capacitance differences likely are not an issue. For superhets, this may be an issue.
Attached is another pic from John Eng's site. Unfortunately, he does not describe how he cut the stem out of the tube:
+1 on Arran's comments. 1Q5s were a common replacement for WD11s, as they are cheap. 3Q5s should be similar. I had several articles on this in the past but can only find one, here:
In TRF sets like an Aeriola Sr, Radiola 2 or a Radiola 3 (converted for 3V tubes or the 3Q5s wired for 1.5V), the interelectrode capacitance differences likely are not an issue. For superhets, this may be an issue.
"Do Justly, love Mercy and walk humbly with your God"- Micah 6:8
"Let us begin to do good"- St. Francis
Best Regards,
MrFixr55
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