[R-390] R-390A stuck slugs

[fdigio1]

I have seen this tool set on eBay:https://www.ebay.com/itm/174314952775Francesco, INEXZP
-------- Messaggio originale --------Da: Karsten Simon via R-390 <r-390 at mailman.qth.net> Data: 20/04/25  16:05  (GMT+01:00) A: r-390 at mailman.qth.net Oggetto: [R-390]  R-390A stuck slugs Jaques,·         My hexagonal socket wrench for the tuning slugs is 2,6 mm wide(distance between two parallel planes measured with micrometer). Apparentlysame size as hex holes in the slugs of my 51S-1 receiver. However, you name2,38 mm instead of 2,6 mm (??).·         Wrench manufacturer is German firm Bernstein, renown maker ofprecision radio/electronics/mechanics tools. Bernstein type is 1-525.Material is all plastic. Hex head is glued to shaft, shaft is probably somespecial tough material. Wrench shaft is somewhat springy, probably toprevent excessive torsion.·         Wrench fits precisely but tip is too short. Does not reach bottomslug.·         Top slugs in Z503, T501, T208 are free. Top slugs in T502, T503are stuck.·         Bottom slugs unknown because tool is too short – no probingpossible.·         All tuning slugs are undamaged.·         Tried drops of WD40 on T502 top slug (->Internet). No successafter 24 hours. Still stuck. Questions:·         How can I loosen the stuck tuning slugs?·         Where can I buy a suitable socket wrench (short 2,6 mm hexagonaltip, long thin shaft)?·         Or should I simply skip alignment of these inductive components?Manual says normally no readjustment needed. Happy Easter + 73 from Moenchengladbach/Germany,Karsten   -----Ursprüngliche Nachricht-----Von: Jacques Fortin [mailto:jacques.f at videotron.ca] Gesendet: Sonntag, 20. April 2025 04:50An: 'Karsten Simon'; r-390 at mailman.qth.netBetreff: RE: [R-390] R-390A stuck slugsWichtigkeit: Hoch Karsten, can you give more precisions about the "stuck" slugs ?Are you talking about the top or the bottom ones in each of the IFtransformers, or both ??Are the slugs seems to be cracked ?Is the slug of Z503 moving ? Which tool are you using ?The hexagonal openings of the tuning slugs are 3/32th of inch in size(2,38mm)Maybe that if you use metric size drivers (2,0mm ?) that they just "turn" inthe cores hex openings without moving those.See attached picture. 73, Jacques, VE2JFE in Montreal______________________________________________________________R-390 mailing listHome: http://mailman.qth.net/mailman/listinfo/r-390Help: http://mailman.qth.net/mmfaq.htmPost: mailto:R-390 at mailman.qth.netThis list hosted by: http://www.qsl.netPlease help support this email list: http://www.qsl.net/donate.html