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PC999 components
- Thread starter Tomsawier
- Start date
Per the service manual bill of materials
BLBY-0209001 LB-209 113cn-6485z
same for L27 and L30
Using the 113cn-6385z designation, seems to also be in a Galaxy dx-979 (L25) ECIFT12013,
or L25 in a Galaxy dx2517,probably others. That's all I found so far.
BLBY-0209001 LB-209 113cn-6485z
same for L27 and L30
Using the 113cn-6385z designation, seems to also be in a Galaxy dx-979 (L25) ECIFT12013,
or L25 in a Galaxy dx2517,probably others. That's all I found so far.
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this is going to be a difficult part to track down.
you're not really going to find any listed value, but the coil you are looking for is an LB-209.
It is for the 16mhz local oscillator circuit, and tunes the LSB section.
it also happens to be the same coil as L30 in your radio, so if you have one of those, you can remove it and measure it, but again, that's not really how anyone would have it listed.
you might try Kenselectronics.com.
I have already looked on Barkett's site and didn't see one there.
there is something you can try, but i can't guarantee it will work.
Old galaxy exports used to also use a 16 mhz LO but not quite the same freqs as the grant DX.
so, the galaxy export part you can try is from the DX77HML:
stores.goldeneagleradios.com
or the one from the galaxy DX959 would be:
stores.goldeneagleradios.com
there is another coil that could work if the footprints of those others wont work found here:
stores.goldeneagleradios.com
i cant guarantee they will fit, or if they will work, but in the interest of saving on shipping, its probably worth it to just buy all three at once.
good luck!
LC
you're not really going to find any listed value, but the coil you are looking for is an LB-209.
It is for the 16mhz local oscillator circuit, and tunes the LSB section.
it also happens to be the same coil as L30 in your radio, so if you have one of those, you can remove it and measure it, but again, that's not really how anyone would have it listed.
you might try Kenselectronics.com.
I have already looked on Barkett's site and didn't see one there.
there is something you can try, but i can't guarantee it will work.
Old galaxy exports used to also use a 16 mhz LO but not quite the same freqs as the grant DX.
so, the galaxy export part you can try is from the DX77HML:
IF Transformer IFT 12013
or the one from the galaxy DX959 would be:
IF Transformer IFT 12012
there is another coil that could work if the footprints of those others wont work found here:
IF Transformer IFT 12016
i cant guarantee they will fit, or if they will work, but in the interest of saving on shipping, its probably worth it to just buy all three at once.
good luck!
LC
All of the inductors in that area should at least have the same ferrite material, so I would grab any of them.
The difference between that can and the one next to it is that your can is for LSB and is pulling the crystal a little lower in frequency. Knowing that fact, you can expect it to have a turn or two more than the can next to it. The more inductance you have there, the more the crystal is pulled down.
If the crystal can't be set low enough, add turns. If it can't be set high enough, remove turns.
The difference between that can and the one next to it is that your can is for LSB and is pulling the crystal a little lower in frequency. Knowing that fact, you can expect it to have a turn or two more than the can next to it. The more inductance you have there, the more the crystal is pulled down.
If the crystal can't be set low enough, add turns. If it can't be set high enough, remove turns.
I got the value of the L27!
A CB pro technician desoldered one and measured it. Without the ferrite core, it’s 1.8–2 microhenries, with the ferrite core, it’s 5.7 microhenries.
Also, I’m missing the L17 coil, but it can be replaced as follows if no such coil is available.
Instead of the coil, use a 1.5 kOhm resistor, and replace C86 with a 100 pF capacitor.
A CB pro technician desoldered one and measured it. Without the ferrite core, it’s 1.8–2 microhenries, with the ferrite core, it’s 5.7 microhenries.
Also, I’m missing the L17 coil, but it can be replaced as follows if no such coil is available.
Instead of the coil, use a 1.5 kOhm resistor, and replace C86 with a 100 pF capacitor.
Do you know whether he measured the primary or the secondary of the coil?
some of these coils have both and only one side is used.
also, with the ferrite slug, the value will vary depending on it's position.
Even if you have all that right, there is more to a tuning coil than just its value in henrys.
that's why slugs have different permeabilities.
its also why these coils are never marked with a value, only a frequency.
as for L17, that coil has a very important job and should be peaked while using an oscilloscope.
hey, if it all works out then more power to you, but i have a feeling you are in for some disappointment.
LC
In the Pres Grant with the 858 PLL, Coil L27 is Toko part # LC018. Value is .28 mh. L27 and L30 are not the same. L30 is Toko part# LC019. Value is .36 mh.
- J. J. 399
- J. J. 399
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Believe me, if I've learned anything, it's that it's better to trust others' experiences than to stubbornly cling to something.
An approximate value will be good enough as a reference, but I'll focus on the frequency.
I'll order a few, and then I'll adjust the coil turns until the frequency falls into place.