> > Well, the problem that we are having is that the
> radio used to tune 100 watts on the rf power and
> really talked without the modulation dropping much..
I'm having some trouble interpreting that.
None of those radios can dead-key 100 watts
and not backswing badly.
I'm going to assume what you mean is that
one way or another the radios output has
dropped.
> then one day he turned it on and the radio would do no
> more than 40 watts on a dead key vs 100 the day before
> and when the problem occured and he had the radio full
> blast his modulation would drop significatly.. I
> thought it might be a tune problem but he swears he
> was not inside the radio and he also said that he runs
> a good match.. this has got me stumped... any help
> would still be appreciated.. thank you sam
I think you're on the right track. I'd start by
verifying the transmitter alignment. If the
alignment is correct, and checking it doesn't
guide you to the bad stage, signal trace it
with a scope to verify proper stage gain. If
you've never done that, start by checking a
known good radio and noting the peak-to-peak
voltages at the bases and collectors of all
the RF amp stages. Verify that the proper
amount of modulating audio is showing up
at the driver and final by noting the dead-key
and 100% modulation voltages on the known
good radio and comparing them to the other
radio. The Galaxy Saturn Turbo is a regular
radio with a 2 transistor linear amp added to
increase the output. A regular radio and a
2 device amp can be used to get your com-
parison voltages.
--
Hi Sam
Your problem could be in the power supply.
Make sure the voltage isn't dropping on keyup..
Hope this helps..
Keith
----- Original Message -----
From: "sam holmes" <chopsam2@...>
To: <cbmods@yahoogroups.com>
Sent: Thursday, April 25, 2002 9:56 AM
Subject: Re: [cbmods] galaxy saturn turbo
>
> --- Bill Eitner <kd6tas@...> wrote:
> >
> > > hello, I am the only radio doctor local and I have
> > a problem... A man
> > > came to me wanting to fix his saturn and the
> > problem is that the rf
> > > power will not turn up above 40 watts..
> >
> > 40 average or peak?
> >
> > If it's average, leave it be. When tuned up
> > those
> > radios produce 150 peak watts on an accurate
> > meter and around 200 on a loose meter. To
> > have good modulation and no backswing on an
> > average reading meter the average power can't
> > be anymore than 1/4 of the peak power. In this
> > case 40 average watts will equal 160 peak watts
> > at 100% modulation. In other words, about 40
> > average watts is all you're going to get out of
> > that radio without compressing the positive
> > modulation peaks and creating negative carrier
> > shift (backswing on an average reading meter
> > when modulating).
> >
> > > I told him that the high
> > > power was probably shot but I was not sure.. oh,
> > when he tries to
> > > turn it up higher his modulation drops to about 50
> > percent.. any help
> > > would be greatly appreciated thank you
> >
> > Tune the radio for maximum peak (modulated)
> > power. If you have a powered peak reading
> > meter, set the range controls for the front
> > panel RF power knob so that the maximum
> > dead-key power is 1/2 of the peak and the
> > minimum is 2 watts. The maximum is for
> > FM use since FM has a consistent amplitude.
> > The minimum is for running other CB amplifiers.
> > The normal setting will be where the dead-key
> > wattage is 1/4 of the peak.
> >
> > If you don't have a good peak reading meter but
> > you have a scope, set the RF power range
> > controls to where at maximum the AM amplitude
> > increases by 50% at 100% modulation, and
> > at minimum the dead-key is 2 watts. These
> > settings are the same as above. The normal
> > setting will be where the AM amplitude doubles
> > at 100% modulation.
> > --
> > > sam
> >
> >
> > Well, the problem that we are having is that the
> radio used to tune 100 watts on the rf power and
> really talked without the modulation dropping much..
> then one day he turned it on and the radio would do no
> more than 40 watts on a dead key vs 100 the day before
> and when the problem occured and he had the radio full
> blast his modulation would drop significatly.. I
> thought it might be a tune problem but he swears he
> was not inside the radio and he also said that he runs
> a good match.. this has got me stumped... any help
> would still be appreciated.. thank you sam
>
>
> __________________________________________________
> Do You Yahoo!?
> Yahoo! Games - play chess, backgammon, pool and more
> http://games.yahoo.com/
>
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
--- Bill Eitner <kd6tas@...> wrote:
>
> > hello, I am the only radio doctor local and I have
> a problem... A man
> > came to me wanting to fix his saturn and the
> problem is that the rf
> > power will not turn up above 40 watts..
>
> 40 average or peak?
>
> If it's average, leave it be. When tuned up
> those
> radios produce 150 peak watts on an accurate
> meter and around 200 on a loose meter. To
> have good modulation and no backswing on an
> average reading meter the average power can't
> be anymore than 1/4 of the peak power. In this
> case 40 average watts will equal 160 peak watts
> at 100% modulation. In other words, about 40
> average watts is all you're going to get out of
> that radio without compressing the positive
> modulation peaks and creating negative carrier
> shift (backswing on an average reading meter
> when modulating).
>
> > I told him that the high
> > power was probably shot but I was not sure.. oh,
> when he tries to
> > turn it up higher his modulation drops to about 50
> percent.. any help
> > would be greatly appreciated thank you
>
> Tune the radio for maximum peak (modulated)
> power. If you have a powered peak reading
> meter, set the range controls for the front
> panel RF power knob so that the maximum
> dead-key power is 1/2 of the peak and the
> minimum is 2 watts. The maximum is for
> FM use since FM has a consistent amplitude.
> The minimum is for running other CB amplifiers.
> The normal setting will be where the dead-key
> wattage is 1/4 of the peak.
>
> If you don't have a good peak reading meter but
> you have a scope, set the RF power range
> controls to where at maximum the AM amplitude
> increases by 50% at 100% modulation, and
> at minimum the dead-key is 2 watts. These
> settings are the same as above. The normal
> setting will be where the AM amplitude doubles
> at 100% modulation.
> --
> > sam
>
>
> Well, the problem that we are having is that the
radio used to tune 100 watts on the rf power and
really talked without the modulation dropping much..
then one day he turned it on and the radio would do no
more than 40 watts on a dead key vs 100 the day before
and when the problem occured and he had the radio full
blast his modulation would drop significatly.. I
thought it might be a tune problem but he swears he
was not inside the radio and he also said that he runs
a good match.. this has got me stumped... any help
would still be appreciated.. thank you sam
__________________________________________________
Do You Yahoo!?
Yahoo! Games - play chess, backgammon, pool and more
http://games.yahoo.com/
> hello, I am the only radio doctor local and I have a problem... A man
> came to me wanting to fix his saturn and the problem is that the rf
> power will not turn up above 40 watts..
40 average or peak?
If it's average, leave it be. When tuned up those
radios produce 150 peak watts on an accurate
meter and around 200 on a loose meter. To
have good modulation and no backswing on an
average reading meter the average power can't
be anymore than 1/4 of the peak power. In this
case 40 average watts will equal 160 peak watts
at 100% modulation. In other words, about 40
average watts is all you're going to get out of
that radio without compressing the positive
modulation peaks and creating negative carrier
shift (backswing on an average reading meter
when modulating).
> I told him that the high
> power was probably shot but I was not sure.. oh, when he tries to
> turn it up higher his modulation drops to about 50 percent.. any help
> would be greatly appreciated thank you
Tune the radio for maximum peak (modulated)
power. If you have a powered peak reading
meter, set the range controls for the front
panel RF power knob so that the maximum
dead-key power is 1/2 of the peak and the
minimum is 2 watts. The maximum is for
FM use since FM has a consistent amplitude.
The minimum is for running other CB amplifiers.
The normal setting will be where the dead-key
wattage is 1/4 of the peak.
If you don't have a good peak reading meter but
you have a scope, set the RF power range
controls to where at maximum the AM amplitude
increases by 50% at 100% modulation, and
at minimum the dead-key is 2 watts. These
settings are the same as above. The normal
setting will be where the AM amplitude doubles
at 100% modulation.
--
> sam
hello, I am the only radio doctor local and I have a problem... A man
came to me wanting to fix his saturn and the problem is that the rf
power will not turn up above 40 watts.. I told him that the high
power was probably shot but I was not sure.. oh, when he tries to
turn it up higher his modulation drops to about 50 percent.. any help
would be greatly appreciated thank you sam
hi guys were cant i by the old model of the Renger 2950 no the DX
model in cooper electronics they sell the mirage RCI 2950 is the seme
as the Renger 2950 like the old model i dont like the DX PLS Hellp
thanks and have a nice day guys.
The best way to get 120 channels is to install
a kit that switches in different loop mixing crystals.
The appropriate kit will use the stock crystal plus
2 others that create 2 other nice, symmetrical
40 channel bands. With a properly modified
clarifier you'll be able to pick up the 5 "A" channels
in each band (15 total channels). So, in the end
you'll have 135 total channels. Just keep in mind
that the Washington was designed to cover a range
of only 45 channels (the regular 40 and the 5 "A"
channels that are in the regular CB band). There
will be some performance degradation as you go
away from where the radio is aligned.
As for the "6 position switch mod"--it's a myth.
The PLL chip will go 26.815 (15 below 1) to
28.045 (64 above 40). Sliding down to 26.805
gives you the 16th channel below Channel 1.
That's 80 extra channels and it only requires 4
switch positions. Some techs do a mod where
they "float" the pin 10 logic in order to get more
lowers, but I don't recommend it for two reasons:
A) As I already explained, the Washington
chassis is not broad banded. In other words,
the performance beyond about 20 channels
past the regular CB band is noticeably degraded.
There are "broad-banding" mods, but they ruin
the stock performance by making the receiver
noisy and the transmitter sloppy.
B. "Floating" pin 10 is a risky and difficult mod.
If you blow pin 10 chances are the synthesizer
won't work at all.
--
> hello, i have a problem... I would like to modify my washington for
> extra channels (above&below40) but do not want to change the
> crystal... There is an old mod for the 8719 that involves a 6
> position switch and adjusting the vco but i cannot seem to find it..
> i know it exists just not where... locals around here have them in
> their washington but they are not being very sharing could you help
> me out??
Yes.
--
----- Original Message -----
From: "el61hydraglide" <el61hydraglide_1999@...>
To: <cbmods@yahoogroups.com>
Sent: April 14, 2002 11:54 AM
Subject: [cbmods] antenna length
> iv got a willson 5000 can i shorten the length of the cable thanks
>
>
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
>
hello, i have a problem... I would like to modify my washington for
extra channels (above&below40) but do not want to change the
crystal... There is an old mod for the 8719 that involves a 6
position switch and adjusting the vco but i cannot seem to find it..
i know it exists just not where... locals around here have them in
their washington but they are not being very sharing could you help
me out??
thanks and thats what midland says (repair shop). they also said i
could take it to a repair shop if they will do warranty work. ill let
the club know what it was when i get it back
--- In cbmods@y..., "Bill Eitner" <kd6tas@n...> wrote:
> Sounds like a synthesizer (or related oscillator) problem.
> Those are not easy "cookbook" type repairs--especially
> on a model that's not really popular.
>
> I recommend sending it to a factory repair facility.
> --
> ----- Original Message -----
> From: "el61hydraglide" <el61hydraglide_1999@y...>
> To: <cbmods@y...>
> Sent: April 09, 2002 11:17 PM
> Subject: [cbmods] 79-270 no transmit or recieve
>
>
> > I got a midland 79-290 and a wilson 5000 magnet mount antenna and
i
> > just installed it in my truck. When i hooked up the swr meter i
got
> > no out put on the scale i also got no output on the display
meter.
> > the tx light and indicator on the screen light up the manual for
the
> > radio says that if the tx indicator is below half power than it is
> > most likely a antenna problem but i tried a nother antenna that i
> > know works and it did the same thing. i tried it with another
radio
> > and it did not transmit or recieve a signal. the weather station
dose
> > come in tho. please can any one help thanks
> >
> >
> >
> >
> >
> >
> > Your use of Yahoo! Groups is subject to
http://docs.yahoo.com/info/terms/
> >
> >
> >
Sounds like a synthesizer (or related oscillator) problem.
Those are not easy "cookbook" type repairs--especially
on a model that's not really popular.
I recommend sending it to a factory repair facility.
--
----- Original Message -----
From: "el61hydraglide" <el61hydraglide_1999@...>
To: <cbmods@yahoogroups.com>
Sent: April 09, 2002 11:17 PM
Subject: [cbmods] 79-270 no transmit or recieve
> I got a midland 79-290 and a wilson 5000 magnet mount antenna and i
> just installed it in my truck. When i hooked up the swr meter i got
> no out put on the scale i also got no output on the display meter.
> the tx light and indicator on the screen light up the manual for the
> radio says that if the tx indicator is below half power than it is
> most likely a antenna problem but i tried a nother antenna that i
> know works and it did the same thing. i tried it with another radio
> and it did not transmit or recieve a signal. the weather station dose
> come in tho. please can any one help thanks
>
>
>
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
>
--- In cbmods@y..., "el61hydraglide" <el61hydraglide_1999@y...> wrote:
> I got a midland 79-290 and a wilson 5000 magnet mount antenna and i
> just installed it in my truck. When i hooked up the swr meter i got
> no out put on the scale i also got no output on the display meter.
> the tx light and indicator on the screen light up the manual for
the
> radio says that if the tx indicator is below half power than it is
> most likely a antenna problem but i tried a nother antenna that i
> know works and it did the same thing. i tried it with another radio
> and it did not transmit or recieve a signal. the weather station
dose
> come in tho. please can any one help thanks
I got a midland 79-290 and a wilson 5000 magnet mount antenna and i
just installed it in my truck. When i hooked up the swr meter i got
no out put on the scale i also got no output on the display meter.
the tx light and indicator on the screen light up the manual for the
radio says that if the tx indicator is below half power than it is
most likely a antenna problem but i tried a nother antenna that i
know works and it did the same thing. i tried it with another radio
and it did not transmit or recieve a signal. the weather station dose
come in tho. please can any one help thanks
i just got this and need to see if there are any mods for it. if any one can help i would really appriciate it. i am not havig any luck finding a site that even has excalibers.
i just got this and need to see if there are any mods for it. if any one can help i would really appriciate it. i am not havig any luck finding a site that even has excalibers.
Hi this Radio is of the Galaxy radio type better known as the FALCON 2000 .I
once had one when I was out in NM. Here is some infomation that you might
have or not but banyway good luck. ............................A.EXCALIBUR
SSB (srt-3600-10-Board)1. removeTR-32 2.change R-174 910k) to a 2.2k 3.
change R-187 (10k) to a 2.2k ( power
mod)........................................................................
......The EXCALABUR with the (ept-3600 10z board) 1.same as above then
adjust VR-1.."S" meter VR-2..ssb "S" meter VR3_ ssb S QUELCH VR4..AM
..Squelch VR5-FM-Deviation VR7-carrier Balance.. VR8_..Rf Tran Meter..
VR-12..Ssb Tran Power VR-13.. AM trans Power VR-14..AM MOD VR-16 .CW tone
VR-802.. low ssb power VR-803..low am power. May be this can be of some
help. Thank you Sams Ram
From: "pandamom42000" <pandamom42000@...>
To: <cbmods@yahoogroups.com>
Sent: Wednesday, April 03, 2002 6:33 AM
Subject: [cbmods] excaliber ssb base station
> i just got this and need to see if there are any mods for it.
> if any one can help i would really appriciate it. i am not havig any
> luck finding a site that even has excalibers.
>
>
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
>
i just got this and need to see if there are any mods for it. if any one can help i would really appriciate it. i am not havig any luck finding a site that even has excalibers.
i just got this and need to see if there are any mods for it.
if any one can help i would really appriciate it. i am not havig any
luck finding a site that even has excalibers.
THis site was able to approve me for two credit cards. It only took
about 1 minite too. It's worth a shot!
Click on link below to goto site
http://apply4creditcard.com
those numbers are not listed....
-----Original Message-----
From: enemiescode0101 [mailto:enemiescode0101@...]
Sent: Friday, March 22, 2002 7:32 PM
To: cbmods@yahoogroups.com
Subject: [cbmods] Re: Cobra 18 WX ST
--- In cbmods@y..., "BOWEN, SCOTT M. (JSC-CC) (LM)"
<scott.m.bowen1@j...> wrote:
> What is the
> PLL part number?
>
> it is easier to find mods by using that part #.
>
> Bow
>
> -----Original Message-----
> From: enemiescode0101 [mailto:enemiescode0101@y...]
> Sent: Thursday, March 21, 2002 5:59 PM
> To: cbmods@y...
> Subject: [cbmods] Cobra 18 WX ST
>
>
>
>MC3361CP
CTFK9903
>
>
>
>
>
Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
--- In cbmods@y..., "BOWEN, SCOTT M. (JSC-CC) (LM)"
<scott.m.bowen1@j...> wrote:
> What is the
> PLL part number?
>
> it is easier to find mods by using that part #.
>
> Bow
>
> -----Original Message-----
> From: enemiescode0101 [mailto:enemiescode0101@y...]
> Sent: Thursday, March 21, 2002 5:59 PM
> To: cbmods@y...
> Subject: [cbmods] Cobra 18 WX ST
>
>
>
>MC3361CP
CTFK9903
>
>
>
>
>
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