Probably not going to be exactly what you want... but I'll throw this out for you.
Hamtronics sells a grab bag of parts and the bag contains coils he/they Jerry/Hamtronics uses on/with their kits. I buy the grab bags and I have spare parts and parts to proto-type with... and they're cheap. (buy the grab bag for the coils... the individual coil purchase doesn't have the slugs... cheers, skipp > "wb6dgn" <tallins...@...> wrote: > > > I measured the existing coil slugs as follows; > The slugs for L802 through L809 measure 0.129" at the outside of the threads. > The slugs for coils L301 and L302 measure 0.180" > I didn't measure the slugs for L801, L810 or L811 as those do appear to tune > adequately. > Hope this helps. > Tom DGN > > --- In [email protected], "wb6dgn" <tallinson2@> wrote: > > > > > > > > Sorry for the lack of detail. The radio is a 42 to 50 Mc. Motran with the > > "L" series receiver (same as used in the Motrac). There are a total of 13 > > tuned circuits in the front end and multiplier but only 3 of them seem to > > tune at all. Those are L801, 810 and 811. The other preselector coils, > > L802 through L809 do not tune nor do the multiplier coils, L301 and L302. > > Interestingly, the radio does receive a local repeater when I tack a short > > piece of wire onto the first mixer input point so, obviously, the > > multiplier chain is on the correct harmonic and has some output at the > > correct frequency. The test set indication is quite low, however, compared > > to the original frequency, so I know that the circuits are not tuned to > > resonance. I am not able to get even a strong signal through the front > > end, though. I did carefully remove all of the related coil slugs without > > breaking any of them and will mic them and repost later this evening. L802 > > through L809 are ABOUT 3/16" dia and L301, 302 are about 1/4" but will give > > more precise measurements later. Thanks much for the replies and > > suggestion. There's a good "old-fashioned" hardware store not too far from > > me, will check with them tomorrow. > > Tom DGN > > > > --- In [email protected], "Eric Lemmon" <wb6fly@> wrote: > > > > > > Tom, > > > > > > If you identify the make and model of the radio, perhaps someone who has > > > gone this route before can comment. Otherwise, carefully remove one of > > > the > > > slugs and take it to a good hardware store where you can use a thread > > > gauge > > > to identify the thread diameter and pitch. With luck, that store may have > > > machine screws in brass and aluminum that can be trimmed to make the > > > proper > > > slugs. > > > > > > 73, Eric Lemmon WB6FLY > > > > > > > > > -----Original Message----- > > > From: [email protected] > > > [mailto:[email protected]] On Behalf Of wb6dgn > > > Sent: Tuesday, December 15, 2009 8:46 PM > > > To: [email protected] > > > Subject: [Repeater-Builder] Source of Coil Slugs > > > > > > > > > > > > I'm trying to modify a commercial boat anchor from 42 - 50 Mc. up to the 6 > > > meter ham band. Not even one coil in the RF preselector and 1st > > > oscillator/multiplier chain will tune into the ham band, which is very > > > unusual for this radio. There are just too many tuned circuits to consider > > > removing coil windings or changing capacitors so I want to try using brass > > > or aluminum coil slugs in place of the powdered iron ones now used. Does > > > anyone know of a source for these slugs? I can mic. the slug diameter and > > > guestimate the thread pitch if anyone has any suggestions. TIA for any/all > > > help. > > > Tom DGN > > > > > >
