[Repeater-Builder] Re: Source of Coil Slugs
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 Repeater-Builder@yahoogroups.com, 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 Repeater-Builder@yahoogroups.com, 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: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of wb6dgn Sent: Tuesday, December 15, 2009 8:46 PM To: Repeater-Builder@yahoogroups.com 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
Re: [Repeater-Builder] Re: Source of Coil Slugs
Tom, Your project brings back alot of memories. I do have a good assortment of low value mica caps (same physical size as used across helicals). Lots of 2pf on up to at least 10pf. I used many of the caps to Pad coils in Sensicon and Motrac rigs, in years gone by. I enjoy Motrac Stuff...Still using a Motrac rpt.(100w tube PA). Let me know off line if you require any caps..Merry Christmas! Tim W7TRH / AFA0TP Wa. - Original Message - From: wb6dgn tallins...@yahoo.com To: Repeater-Builder@yahoogroups.com Sent: Wednesday, December 16, 2009 4:17:07 PM GMT -08:00 US/Canada Pacific Subject: [Repeater-Builder] Re: Source of Coil Slugs 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 Repeater-Builder@yahoogroups.com , wb6dgn tallins...@... 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 Repeater-Builder@yahoogroups.com , 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: Repeater-Builder@yahoogroups.com [mailto: Repeater-Builder@yahoogroups.com ] On Behalf Of wb6dgn Sent: Tuesday, December 15, 2009 8:46 PM To: Repeater-Builder@yahoogroups.com 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
RE: [Repeater-Builder] Re: Source of Coil Slugs - OT reply
Holy cow, Skipp!! I haven't conjugated verbs for years... (Is that the term??) I/you/he/she/we/they/it... Wow!! Hahahaha -Original Message- From: Repeater-Builder@yahoogroups.com On Behalf Of skipp025 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
[Repeater-Builder] Re: Motorola Spectra Power Cord Reversal
Thanks to all for the advice about the Spectra that I connected reverse polarity power to. Replacing the big, honkin' diode near where the red power lead connects to the board solved the problem. Apparently, no other damage was done, despite my foolish oversight. And, thanks to Motorola for a good engineering design! It's nice to find a friendly, helpful group like this one! Thanks again to those who responded to my plea. _ Stephen, WR9A shortw...@verizon.net
RE: [Repeater-Builder] Re: Motorola Spectra Power Cord Reversal
FB, Stephen. Glad to hear you were able to resurrect it! Mark - N9WYS -Original Message- From: Repeater-Builder@yahoogroups.com On Behalf Of Stephen M. Parker Thanks to all for the advice about the Spectra that I connected reverse polarity power to. Replacing the big, honkin' diode near where the red power lead connects to the board solved the problem. Apparently, no other damage was done, despite my foolish oversight. And, thanks to Motorola for a good engineering design! It's nice to find a friendly, helpful group like this one! Thanks again to those who responded to my plea. _ Stephen, WR9A shortw...@verizon.net
RE: [Repeater-Builder] Re: Motorola Spectra Power Cord Reversal
Hello Stephen, Just to let you know, a friend of me gave me a Motorola Maxtrac100 and like you he plug the power in reverse. The power plug was not made by Motorola and colours was reversed (without fuse). Here all the parts I changed, someone was shorted, open or completely destroy. Logic Board HLN9123A VR807 Q802 U401 Q401 Q506 Q507 Q402 VHF 25 Watts RF amplifier: Q2320 R2371 L2233 CE2370 Maybe this information can be good for someone with similar trouble 73 Eric VE2VXT /VE7 _ De : Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] De la part de Mark Envoyé : 17 décembre 2009 15:36 À : Repeater-Builder@yahoogroups.com Objet : RE: [Repeater-Builder] Re: Motorola Spectra Power Cord Reversal FB, Stephen. Glad to hear you were able to resurrect it! Mark - N9WYS -Original Message- From: Repeater-Builder@ mailto:Repeater-Builder%40yahoogroups.com yahoogroups.com On Behalf Of Stephen M. Parker Thanks to all for the advice about the Spectra that I connected reverse polarity power to. Replacing the big, honkin' diode near where the red power lead connects to the board solved the problem. Apparently, no other damage was done, despite my foolish oversight. And, thanks to Motorola for a good engineering design! It's nice to find a friendly, helpful group like this one! Thanks again to those who responded to my plea. _ Stephen, WR9A shortw...@verizon. mailto:shortwave%40verizon.net net __ Information from ESET NOD32 Antivirus, version of virus signature database 4697 (20091217) __ The message was checked by ESET NOD32 Antivirus. http://www.eset.com __ Information from ESET NOD32 Antivirus, version of virus signature database 4697 (20091217) __ The message was checked by ESET NOD32 Antivirus. http://www.eset.com __ Information from ESET NOD32 Antivirus, version of virus signature database 4697 (20091217) __ The message was checked by ESET NOD32 Antivirus. http://www.eset.com
[Repeater-Builder] Mastr2 19C320671G2 Intercom board info?
Can anyone point me to an LBI for the following GE MastrII board? 19C320671G2 Intercom module I would like to review a schematic of this board and see how I can utilize it to source filtered/de-emphasized receive audio. Thanks Eric KE2D
[Repeater-Builder] GE MastrII CAS vs. RUS vs. RX Mute?
After looking over the LBIs and performing a few conversions, I have a question regarding which everyone feels is the best source for a CAS signal into a repeater controller - CAS, RUS, or RX Mute. In regards to a COS source, I see a number of publications and sites recommend CAS, then I see a few others using RUS, and looking at the schematics, it appears RX Mute may not be a bad choice also. As originally configured, per the LBIs, a Channel Guard configured MastrII would trigger CAS with a carrier squelch signal, and RUS would only go active with the proper PL tone present. But once the Channel Guard board is removed, is one any better than the other for cos usage? Assuming C630 is in place on the IFAS board, does only one of the above sources afford the dual speed squelch action, and the others not, or do all three provide the same dual-speed muting action? Looking at the IFAS schematic and squelch chip block diagram, it is not very clear. Also assume the PL detect signal has been isolated from the squelch circuit, and only feeds the external repeater controller, so there would be no interaction regardless of PL being present or not (similar to removing JU202 on a Micor AS board to isolate pl from causing the squelch chip into long mode whenever pl is present). Eric KE2D
RE: [Repeater-Builder] Mastr2 19C320671G2 Intercom board info?
Eric, My GE microfiche reveals that LBI-4831, -30951, and -30965 contain information about the 19C320671G2 module. Alas, none of these LBIs is on the RBTIP GE listing. If you are unable to find any of the stated LBIs, I may be able to extract a (barely-readable) schematic directly from the microfiche. It won't be pretty, but it may meet your needs. 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of kk2ed Sent: Thursday, December 17, 2009 6:41 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Mastr2 19C320671G2 Intercom board info? Can anyone point me to an LBI for the following GE MastrII board? 19C320671G2 Intercom module I would like to review a schematic of this board and see how I can utilize it to source filtered/de-emphasized receive audio. Thanks Eric KE2D
[Repeater-Builder] Re: Mastr2 19C320671G2 Intercom board info?
Thanks for the fast reply, Eric. I also spent the past hour or so downloading and reviewing various LBIs, only to reach your same conclusion. Google and Yahoo only yielded a few classified listings of boards for sale, and one 9-land ham has a few pics of one in his 6m conversion project. Probing around with the COM120B, a scope probe, and the remaining LBIs, it looks like it takes the post-pl filter de-emphasized audio just before the speaker amplifier, then squelch-gates it, and provides it at a proper level to drive a 600 ohm circuit, or something close, as used in remote voting receiver apps. I noticed it provided a nice receive audio source for an external controller at pin P931-15 (Audio To Line), but I would like to really see what exactly is taking place before I commit to using it. Currently, for my conversions, I have been taking rx audio from the IFAS board pin 16, which is downstream from the vol/sq high side, after it has been thru the volume control (in the case of the station units, a fixed pot on the main board, then thru the pl filter/high pass/de-emph filter. It provides a nice quality filtered and de-emph'ed rx audio source, although it is not squelch gated. Not an issue with most controllers, however. In fact, preferred when COR or PL mode is used. I simply solder a jumper on the A901 System Board from IFAS pin 16 (RX PA) to point H59, which is hardwired to SPARE J932-5, providing a rf feedthrough out of the rf deck alongside the rest of the needed external controller signals (ptt, tx audio, cos, pl detect, etc..). I simply set the fixed volume pot on the system board so as to obtain 1v pp (.353v rms) at J932-5. Then, if someone wants to vary the volume at the monitor speaker, simply use the low-mid-high and rec1-off-rec2 switches on the control shelf, rather than touching the pot on the system board inside the rf deck tray. Eric KE2D --- In Repeater-Builder@yahoogroups.com, Eric Lemmon wb6...@... wrote: Eric, My GE microfiche reveals that LBI-4831, -30951, and -30965 contain information about the 19C320671G2 module. Alas, none of these LBIs is on the RBTIP GE listing. If you are unable to find any of the stated LBIs, I may be able to extract a (barely-readable) schematic directly from the microfiche. It won't be pretty, but it may meet your needs. 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of kk2ed Sent: Thursday, December 17, 2009 6:41 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Mastr2 19C320671G2 Intercom board info? Can anyone point me to an LBI for the following GE MastrII board? 19C320671G2 Intercom module I would like to review a schematic of this board and see how I can utilize it to source filtered/de-emphasized receive audio. Thanks Eric KE2D
[Repeater-Builder] Re: Mastr2 19C320671G2 Intercom board info?
When you have a free moment, a scan of the lbi would be greatly appreciated. Something is better than nothing, even mo' better when it's something for free! Thanks Eric KE2D --- In Repeater-Builder@yahoogroups.com, Eric Lemmon wb6...@... wrote: Eric, My GE microfiche reveals that LBI-4831, -30951, and -30965 contain information about the 19C320671G2 module. Alas, none of these LBIs is on the RBTIP GE listing. If you are unable to find any of the stated LBIs, I may be able to extract a (barely-readable) schematic directly from the microfiche. It won't be pretty, but it may meet your needs. 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of kk2ed Sent: Thursday, December 17, 2009 6:41 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Mastr2 19C320671G2 Intercom board info? Can anyone point me to an LBI for the following GE MastrII board? 19C320671G2 Intercom module I would like to review a schematic of this board and see how I can utilize it to source filtered/de-emphasized receive audio. Thanks Eric KE2D
Re: [Repeater-Builder] GE MastrII CAS vs. RUS vs. RX Mute?
At 12/17/2009 18:54, you wrote: After looking over the LBIs and performing a few conversions, I have a question regarding which everyone feels is the best source for a CAS signal into a repeater controller - CAS, RUS, or RX Mute. I used to use RUS, until I discovered that the attack (invalid to valid transition) is significantly delayed, around 50 ms. CAS does not have this delay, I find that the fast squelch performance is better because the chopping is less pronounced. This is because even though the squelch does briefly close on signal nulls during mobile flutter, it opens much faster, so the chopping isn't as noticeable. I still use Micor squelch boards in all my UHF MVPs Mastr II RXs, but I don't bother on the VHF radios as I find the Mastr II squelch works well enough. Bob NO6B
[Repeater-Builder] Re: Source of Coil Slugs
Thanks for all the replies and the suggestions. I don't think I'm brave enough to try to get in there and change coil windings or capacitors in this radio; just too many tuned circuits and some are literally buried under a lot of active circuitry. Disassembling all of that just to get at the coil would be a project beyond my present ability (not that I haven't done that MANY years ago). Also complicating the task is Motorola's use of fabric insulation on the wiring which, by now, has become somewhat brittle, I'm sure. I've seen radios where you just breathe on that wire and the insulation falls off. If I want to build (rebuild) a radio, I think it would probably be a K2 (Hi Hi). I will keep the availability of the capacitors in mind, though. In some of my other projects, that will come in very handy, I'm sure. I did see one reference to slug sizes vs. screw size at Surplus Sales.com. They show the 0.180 as an 8-32 thread and 0.125 as 6-32. If I read that right, maybe finding those slugs won't be as difficult as I first expected. If all else fails and the prototypes do as I expect, I can probably take some brass screws to a machine shop and heve him cut them to length and cut some nice clean slots in the ends for a tuning tool. If anybody is interested, I will follow up with what happens. Also, still looking for a Motrac/Motran (preferably LB) PARTS radio for hardware, etc. so if anybody has a junker, please let me know. Thanks everybody, Tom DGN --- In Repeater-Builder@yahoogroups.com, w7...@... wrote: Tom, Your project brings back alot of memories. I do have a good assortment of low value mica caps (same physical size as used across helicals). Lots of 2pf on up to at least 10pf. I used many of the caps to Pad coils in Sensicon and Motrac rigs, in years gone by. I enjoy Motrac Stuff...Still using a Motrac rpt.(100w tube PA). Let me know off line if you require any caps..Merry Christmas! Tim W7TRH / AFA0TP Wa. - Original Message - From: wb6dgn tallins...@... To: Repeater-Builder@yahoogroups.com Sent: Wednesday, December 16, 2009 4:17:07 PM GMT -08:00 US/Canada Pacific Subject: [Repeater-Builder] Re: Source of Coil Slugs  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 Repeater-Builder@yahoogroups.com , 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 Repeater-Builder@yahoogroups.com , 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: Repeater-Builder@yahoogroups.com [mailto: Repeater-Builder@yahoogroups.com ] On Behalf Of wb6dgn Sent: Tuesday, December 15, 2009 8:46 PM To: Repeater-Builder@yahoogroups.com 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
[Repeater-Builder] Re: Source of Coil Slugs - OT reply
English is a tough language for me... one of 8 to 12 languages I try to trip/fake/bobble my way through/around without much luck/success/rubber-chickens. :-) s. Mark n9...@... wrote: Holy cow, Skipp!! I haven't conjugated verbs for years... (Is that the term??) I/you/he/she/we/they/it... Wow!! Hahahaha -Original Message- From: Repeater-Builder@yahoogroups.com On Behalf Of skipp025 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
Re: [Repeater-Builder] Re: Source of Coil Slugs
The 42 to 50 Mhz Motrac/Motran L receiver should tune 6 meters just fine EXCEPT for the crystal multiplier stage which will need 3 capacitors changed to lower values. If you are having trouble tuning the RF receiver front end, the manual tells you to remove the cover and use a signal generator thru a capacitor to inject signal into each stage for tuning the individual adjustments. Then inject signal in to the normal RF input and tune the entire front end. -- Original Message -- Received: Wed, 16 Dec 2009 04:17:30 PM PST From: wb6dgn tallins...@yahoo.com To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Re: Source of Coil Slugs 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 Repeater-Builder@yahoogroups.com, wb6dgn tallins...@... 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 Repeater-Builder@yahoogroups.com, 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: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of wb6dgn Sent: Tuesday, December 15, 2009 8:46 PM To: Repeater-Builder@yahoogroups.com 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
