president Grant pc-999ae
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president Grant pc-999ae
Hello ALL! please help to remake the radio, the President GRANT CLASSIC to coarse worked, plus or minus 5 kHz from the center
- dt307
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Re: president Grant pc-999ae
hi to get a grant to do the zeros there is a few ways
replace pll (hard) the way i do them
add inductance to the varactor after unlocking the clarifier or coarse (easy but about 7kc max total slide)
rip most of the circuit out and copy a 148 one (hard and she will raft after)
best way for you snip 2 jumpers and wire a switch viewtopic.php?t=38742
been covered before .....try the forum search
replace pll (hard) the way i do them
add inductance to the varactor after unlocking the clarifier or coarse (easy but about 7kc max total slide)
rip most of the circuit out and copy a 148 one (hard and she will raft after)
best way for you snip 2 jumpers and wire a switch viewtopic.php?t=38742
been covered before .....try the forum search
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163dt307-chris
“I fear the day that technology will surpass our human interaction. The world will have a generation of idiots.”
― Albert Einstein
“I fear the day that technology will surpass our human interaction. The world will have a generation of idiots.”
― Albert Einstein
- cb4ever104
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Re: president Grant pc-999ae
The above mod only works on SSB . If I ever get enough time then I'd like to dig a bit deeper into this subject as well . I'm sure there must be a way to get +/- 5khz out of the COARSE control on the later Grants .
Sammy
Sammy
30TM060
Paul aka "Sammy". (108) PY60 Old Paisley DX Group (RIP Rab Markie)
Ex GM0 , now EA5 .
Handle "Fortune Hunter" back in "the day"
Radios ....? Anything that says "TAIWAN R.O.C" on the back.
Paul aka "Sammy". (108) PY60 Old Paisley DX Group (RIP Rab Markie)
Ex GM0 , now EA5 .
Handle "Fortune Hunter" back in "the day"
Radios ....? Anything that says "TAIWAN R.O.C" on the back.
- Mudslinger
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Re: president Grant pc-999ae
Doesn't the 5KC mod also shift the radio up on USB and down on LSB or something like that?
I had a Grant that had been modified like that and it drove me around the bend.
I had a Grant that had been modified like that and it drove me around the bend.
Mudslinger - Simon
26TM274
26CT612
There is no such thing as a Fidelity 1000 which is too good to scrap.
26TM274
26CT612
There is no such thing as a Fidelity 1000 which is too good to scrap.
- dt307
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Re: president Grant pc-999ae
when i get time m8 i will look into it but as i said from when i done one last even giving ott voltage on the varactor and some padding with inductance it wont go 10kc to do -/+5kc
copy the gtldx circuit is an option but a lot of work and the rig will start to raft
i did get a grant to slide 12kc but the way i did it was rough as hell and i rather not explain as it turned the rig into a raft
its why i go the module pll route you get 5kc on a switch and uk 1-40
its cleaner less pain and it stable on frequency 100hz drift max but the cost might be an issue to most
the jumper switch method is prob best but i dont like it and as you say its only ssb
copy the gtldx circuit is an option but a lot of work and the rig will start to raft
i did get a grant to slide 12kc but the way i did it was rough as hell and i rather not explain as it turned the rig into a raft
its why i go the module pll route you get 5kc on a switch and uk 1-40
its cleaner less pain and it stable on frequency 100hz drift max but the cost might be an issue to most
the jumper switch method is prob best but i dont like it and as you say its only ssb
163dt307-chris
“I fear the day that technology will surpass our human interaction. The world will have a generation of idiots.”
― Albert Einstein
“I fear the day that technology will surpass our human interaction. The world will have a generation of idiots.”
― Albert Einstein
- cb4ever104
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Re: president Grant pc-999ae
The first problem is that I don't think there's a diagram for the AD/E Grants with the coarse . So it'll be a bit more work . I'm sure that Nick has commented on this subject a few times in the past , but I can't remember what he said . There are a few methods mentioned in that other thread about replacing those 2 diodes . So it might be worth a shot .dt307 wrote:copy the gtldx circuit is an option but a lot of work and the rig will start to raft
Sammy
30TM060
Paul aka "Sammy". (108) PY60 Old Paisley DX Group (RIP Rab Markie)
Ex GM0 , now EA5 .
Handle "Fortune Hunter" back in "the day"
Radios ....? Anything that says "TAIWAN R.O.C" on the back.
Paul aka "Sammy". (108) PY60 Old Paisley DX Group (RIP Rab Markie)
Ex GM0 , now EA5 .
Handle "Fortune Hunter" back in "the day"
Radios ....? Anything that says "TAIWAN R.O.C" on the back.
- dt307
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Re: president Grant pc-999ae
what i did is change the diode for ones in a cybernet uk and a 4.7 inductor in series
added a crystal in parallel with the orignal this allowed for more pull ability (the grants i do only use one of the crystals for bands the other and inductors are rendered not used as all the bands are generated from a single crystal)
9v on the hot side of the rit, other was grounded
this got me 12kc of slide but wasnt linear ie not -/+ 5kc from center it was more one way than other .
different value resistors were used on the ground side and also different feed voltages used but couldnt get it as i wanted
frequency drift was noticeably worse.
the version of grant with the dual pot is just that it still wont shift like a cobra
i gave up on the idea as the switch method is a good rough and ready approach
now if i do one i just unlock the rit pad the diode a little to get some more slide
put a pll module in with 5kc jump.as long as she slides -/+ 3kc its good to go
but like you say im sure nick has modded one from 148 parts but cant comment on how much work and what the end result was
added a crystal in parallel with the orignal this allowed for more pull ability (the grants i do only use one of the crystals for bands the other and inductors are rendered not used as all the bands are generated from a single crystal)
9v on the hot side of the rit, other was grounded
this got me 12kc of slide but wasnt linear ie not -/+ 5kc from center it was more one way than other .
different value resistors were used on the ground side and also different feed voltages used but couldnt get it as i wanted
frequency drift was noticeably worse.
the version of grant with the dual pot is just that it still wont shift like a cobra
i gave up on the idea as the switch method is a good rough and ready approach
now if i do one i just unlock the rit pad the diode a little to get some more slide
put a pll module in with 5kc jump.as long as she slides -/+ 3kc its good to go
but like you say im sure nick has modded one from 148 parts but cant comment on how much work and what the end result was
163dt307-chris
“I fear the day that technology will surpass our human interaction. The world will have a generation of idiots.”
― Albert Einstein
“I fear the day that technology will surpass our human interaction. The world will have a generation of idiots.”
― Albert Einstein
- cb4ever104
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Re: president Grant pc-999ae
I've only got one Grant anyway , My boxed "Classic" . I did the jumper mod (as I do on them all) on the RF/MOD switch . And +10khz on the BRITE . I don't need the UK40 , so that really gets me all the channels within the 3 bands . It would be nice to know exactly why it won't go +/- 5khz , but I'm not prepared to butcher my radio to find out
S.
S.
30TM060
Paul aka "Sammy". (108) PY60 Old Paisley DX Group (RIP Rab Markie)
Ex GM0 , now EA5 .
Handle "Fortune Hunter" back in "the day"
Radios ....? Anything that says "TAIWAN R.O.C" on the back.
Paul aka "Sammy". (108) PY60 Old Paisley DX Group (RIP Rab Markie)
Ex GM0 , now EA5 .
Handle "Fortune Hunter" back in "the day"
Radios ....? Anything that says "TAIWAN R.O.C" on the back.
- dt307
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Re: president Grant pc-999ae
sorry hijack thread
@harakiri
@harakiri
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163dt307-chris
“I fear the day that technology will surpass our human interaction. The world will have a generation of idiots.”
― Albert Einstein
“I fear the day that technology will surpass our human interaction. The world will have a generation of idiots.”
― Albert Einstein
- harakiri
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Re: president Grant pc-999ae
dt307 wrote:sorry hijack thread
@harakiri
SPDT-relay-diagram.jpg
Thanks dt307 .
Blame me for the hijacked thread. Sorry for that folks.
Eh..Its time.
- 163TM847
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Re: president Grant pc-999ae
I know this is an old thread but i thought i may add some info too it regarding unlocked clarifier shift for the PC-999AB with clarifier only, I have done a similar mod to the Grant black and classic which has dual fine/coarse from factory but i dont have the information to hand, But it will require swapping the 15.4525 for a UNI 15.4500 which are not easy to find.
This will only work on Mid and High unless you do the same mod to the low band circuit, You will also need some parts pulled [preferably] from a scrap MK1 PC-879 148/360, I have done this many times and it works quite well
President Grant PC-999AB getting more slide from unlocked clarifier with original 15.4525
Remove D45
Remove Blue wire from clarifier and connect directly to ground
Remove Grey wire and connect to constant 8v [I am typing this from memory, So if unlocked clarifier works backwards simply swap blue and grey around]
Replace L25/26 with LB209s [From a scrap MK1] L27 [LSB] in a PC-999 is usually an LB209 from factory, If it isnt then replace this also.
Replace D44 vercator diode [With veractor from a scrap PC-879]
Replace C234 8pf to 15pf [This is important, This cap is located by the side of L27 LSB inductor]
Once done put the clarifier to centre and realign L25/26/27 and you should now get roughly + and -7 AM/FM, + and - 6 USB, Generally LSB always has more slide than USB so i have never actually checked the amount.
As mentioned above there will now be some drifting, So align once radio has had a good warm up, But with just an unlocked clarifier you shouldnt really notice it.
Hope this helps.
This will only work on Mid and High unless you do the same mod to the low band circuit, You will also need some parts pulled [preferably] from a scrap MK1 PC-879 148/360, I have done this many times and it works quite well
President Grant PC-999AB getting more slide from unlocked clarifier with original 15.4525
Remove D45
Remove Blue wire from clarifier and connect directly to ground
Remove Grey wire and connect to constant 8v [I am typing this from memory, So if unlocked clarifier works backwards simply swap blue and grey around]
Replace L25/26 with LB209s [From a scrap MK1] L27 [LSB] in a PC-999 is usually an LB209 from factory, If it isnt then replace this also.
Replace D44 vercator diode [With veractor from a scrap PC-879]
Replace C234 8pf to 15pf [This is important, This cap is located by the side of L27 LSB inductor]
Once done put the clarifier to centre and realign L25/26/27 and you should now get roughly + and -7 AM/FM, + and - 6 USB, Generally LSB always has more slide than USB so i have never actually checked the amount.
As mentioned above there will now be some drifting, So align once radio has had a good warm up, But with just an unlocked clarifier you shouldnt really notice it.
Hope this helps.
- cb4ever104
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Re: president Grant pc-999ae
30TM060
Paul aka "Sammy". (108) PY60 Old Paisley DX Group (RIP Rab Markie)
Ex GM0 , now EA5 .
Handle "Fortune Hunter" back in "the day"
Radios ....? Anything that says "TAIWAN R.O.C" on the back.
Paul aka "Sammy". (108) PY60 Old Paisley DX Group (RIP Rab Markie)
Ex GM0 , now EA5 .
Handle "Fortune Hunter" back in "the day"
Radios ....? Anything that says "TAIWAN R.O.C" on the back.
- slamjam
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Re: president Grant pc-999ae
I'm in process of ordering a board from Maurer for one of my grants. It's going to be L/M/H/UK +5 +10. Does anyone know how I'll wire the band switch when it arrives? Can the 3 way be converted to a 4 way switch? If not I might just wire the original 3 way as M/H/UK ?
26DT871 - Ipswich UK
- cb4ever104
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Re: president Grant pc-999ae
If it's like the other modules then you'll have 4 wires off the supplied pcb header . Earthing each wire will give you the desired band . So , as you say you'll need to rewire your current one as that switches in +8V to each band . instead of that you'll have earth as the common and the 4 wires from the header will be the output . Don't think I've ever modded a Grant band switch , but if it's the same one that's used in the 148 (it probably is) , then you can make it 3,4,5 or 6 bands . There's a document on here somewhere that shows you how to do this . I don't have it on this PC . You'll need to remove the back plate , and then move some of the internals to make it 4 way . Don't forget that you'll also be able to ground both +5 and +10khz wires to give you +15khz . That'll allow you to reach those hard to reach places .
Sammy
Sammy
30TM060
Paul aka "Sammy". (108) PY60 Old Paisley DX Group (RIP Rab Markie)
Ex GM0 , now EA5 .
Handle "Fortune Hunter" back in "the day"
Radios ....? Anything that says "TAIWAN R.O.C" on the back.
Paul aka "Sammy". (108) PY60 Old Paisley DX Group (RIP Rab Markie)
Ex GM0 , now EA5 .
Handle "Fortune Hunter" back in "the day"
Radios ....? Anything that says "TAIWAN R.O.C" on the back.
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Re: president Grant pc-999ae
hello everyone add to this topic. I have long since remade my President guarantor classic. I put DS + Arduino . everything works very well