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Is it just me or is the service manual for a 2221a scope next to impossible to find? I have been searching google all evening and have only found the 2221 service manuals for the 60 MHz scope and not the 2221a 100 MHz scope.
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Printed? in invisible ink on unobtaniumn? ...been looking for 10
years myself
Dave
Artekmanuals.com
On 9/24/2012 9:33 PM, KQ8M wrote:
?
Is it just me or is the service manual for a 2221a scope
next to impossible to find? I have been searching google
all evening and have only found the 2221 service manuals
for the 60 MHz scope and not the 2221a 100 MHz scope.
--
Dave Henderson
Manuals@...
PO Box 175
Welch,MN 55089
651-269-4265
|
I am not quite sure of this since I do not have a 2221a manual either
but besides the bandwidth and lack of delayed sweep, I suspect the
2221 is based on the 2230 design which uses a channel switch to do
analog multiplexing in CHOP and ALT modes before the 20 MS/sec ADC
while the 2221a is based on the 2232 design which uses two separate
100 MS/sec ADCs followed by digital multiplexing in CHOP and ALT
modes.
While I really get a lot of use out of my 2230, the analog
multiplexing makes DSO CHOP mode a little weird.
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On Tue, 25 Sep 2012 02:33:32 -0000, "KQ8M" <kq8m@...> wrote: Is it just me or is the service manual for a 2221a scope next to impossible to find? I have been searching google all evening and have only found the 2221 service manuals for the 60 MHz scope and not the 2221a 100 MHz scope.
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Well, I have a couple of dead ones here and I would like to fix them if possible. Even just a schematic with values called out would help. ? 73, Tim Herrick, KQ8M Charter Member North Coast Contesters kq8m@... ? AR-Cluster V6 kq8m.no-ip.org User Ports: 23, 7373? with local skimmer, 7374 without local skimmer Server Ports: V6 3607, V4 Active 3605, V4 Passive 3606 ?
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From: TekScopes@... [mailto:TekScopes@...] On Behalf Of David
Sent: Tuesday, September 25, 2012 12:44 PM
To: TekScopes@...
Subject: Re: [TekScopes] 2221a Service Manual? ? I am not quite sure of this since I do not have a 2221a manual either
but besides the bandwidth and lack of delayed sweep, I suspect the
2221 is based on the 2230 design which uses a channel switch to do
analog multiplexing in CHOP and ALT modes before the 20 MS/sec ADC
while the 2221a is based on the 2232 design which uses two separate
100 MS/sec ADCs followed by digital multiplexing in CHOP and ALT
modes.
While I really get a lot of use out of my 2230, the analog
multiplexing makes DSO CHOP mode a little weird.
On Tue, 25 Sep 2012 02:33:32 -0000, "KQ8M" <kq8m@...> wrote:
>Is it just me or is the service manual for a 2221a scope next to impossible to find? I have been searching google all evening and have only found the 2221 service manuals for the 60 MHz scope and not the 2221a 100 MHz scope.
|
I think the 2232 manual will be the closest match to the 2221a. The
only major difference should be the delayed sweep.
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Show quoted text
On Tue, 25 Sep 2012 12:52:02 -0400, "KQ8M" <kq8m@...> wrote: Well, I have a couple of dead ones here and I would like to fix them if possible. Even just a schematic with values called out would
help.
Tim Herrick, KQ8M
From: TekScopes@... [mailto:TekScopes@...] On Behalf Of David
Sent: Tuesday, September 25, 2012 12:44 PM
To: TekScopes@...
Subject: Re: [TekScopes] 2221a Service Manual
I am not quite sure of this since I do not have a 2221a manual either
but besides the bandwidth and lack of delayed sweep, I suspect the
2221 is based on the 2230 design which uses a channel switch to do
analog multiplexing in CHOP and ALT modes before the 20 MS/sec ADC
while the 2221a is based on the 2232 design which uses two separate
100 MS/sec ADCs followed by digital multiplexing in CHOP and ALT
modes.
While I really get a lot of use out of my 2230, the analog
multiplexing makes DSO CHOP mode a little weird.
On Tue, 25 Sep 2012 02:33:32 -0000, "KQ8M" <kq8m@... <mailto:kq8m%40kq8m.com> > wrote:
Is it just me or is the service manual for a 2221a scope next to impossible to find? I have been searching google all evening and have only found the 2221 service manuals for the 60 MHz scope and not the 2221a 100 MHz scope.
|
OK, Thank you David. I will download that and give it a shot. ? 73, Tim Herrick, KQ8M Charter Member North Coast Contesters kq8m@... ? AR-Cluster V6 kq8m.no-ip.org User Ports: 23, 7373? with local skimmer, 7374 without local skimmer Server Ports: V6 3607, V4 Active 3605, V4 Passive 3606 ?
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Show quoted text
From: TekScopes@... [mailto:TekScopes@...] On Behalf Of David
Sent: Tuesday, September 25, 2012 1:20 PM
To: TekScopes@...
Subject: Re: [TekScopes] 2221a Service Manual? ? I think the 2232 manual will be the closest match to the 2221a. The
only major difference should be the delayed sweep.
On Tue, 25 Sep 2012 12:52:02 -0400, "KQ8M" <kq8m@...> wrote:
>Well, I have a couple of dead ones here and I would like to fix them if possible. Even just a schematic with values called out would
>help.
>
>Tim Herrick, KQ8M
>
>From: TekScopes@... [mailto:TekScopes@...] On Behalf Of David
>Sent: Tuesday, September 25, 2012 12:44 PM
>To: TekScopes@...
>Subject: Re: [TekScopes] 2221a Service Manual
>
>I am not quite sure of this since I do not have a 2221a manual either
>but besides the bandwidth and lack of delayed sweep, I suspect the
>2221 is based on the 2230 design which uses a channel switch to do
>analog multiplexing in CHOP and ALT modes before the 20 MS/sec ADC
>while the 2221a is based on the 2232 design which uses two separate
>100 MS/sec ADCs followed by digital multiplexing in CHOP and ALT
>modes.
>
>While I really get a lot of use out of my 2230, the analog
>multiplexing makes DSO CHOP mode a little weird.
>
>On Tue, 25 Sep 2012 02:33:32 -0000, "KQ8M" <kq8m@... > wrote:
>
>>Is it just me or is the service manual for a 2221a scope next to impossible to find? I have been searching google all evening and
>have only found the 2221 service manuals for the 60 MHz scope and not the 2221a 100 MHz scope.
|
On 09/25/2012 12:52 PM, KQ8M wrote:
?
Well, I have a couple of dead ones here and I
would like to fix them if possible. Even just a
schematic with values called out would help.
?
73,
Tim Herrick, KQ8M
Charter Member North Coast Contesters
kq8m@...
?
AR-Cluster V6 kq8m.no-ip.org
User Ports: 23, 7373? with local skimmer,
7374 without local skimmer
Server Ports: V6 3607, V4 Active 3605, V4
Passive 3606
?
?
?
I am not quite sure of this since I do
not have a 2221a manual either
but besides the bandwidth and lack of delayed
sweep, I suspect the
2221 is based on the 2230 design which uses a
channel switch to do
analog multiplexing in CHOP and ALT modes before
the 20 MS/sec ADC
while the 2221a is based on the 2232 design
which uses two separate
100 MS/sec ADCs followed by digital multiplexing
in CHOP and ALT
modes.
While I really get a lot of use out of my 2230,
the analog
multiplexing makes DSO CHOP mode a little weird.
On Tue, 25 Sep 2012 02:33:32 -0000, "KQ8M" <kq8m@...>
wrote:
>Is it just me or is the service manual for a
2221a scope next to impossible to find? I have
been searching google all evening and have only
found the 2221 service manuals for the 60 MHz
scope and not the 2221a 100 MHz scope.
_
I have a 2221A + 2230(s) & 2232(s).
I think that the are very few, if any differences, within the power
supply
sections of these scopes.
There is a lot of very good material available in the archives about
servicing the PS in these and the 2213(A) 2215(A).
If they are dead, it's probably the second place to look anyway.
The first place is the voltage test points.
A short delay after pushing in the power button is normal on all of
the above scopes.
es
|
Hi,
this guy means he has !!!!
I do not know if he realy has ??!
Herbert
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That's the Operators Manual, not the Service Manual. The Operators Manual
can be had for free, just Google it.
73, Dick, W1KSZ
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On Tue, Sep 25, 2012 at 1:39 PM, Measurement <measurement@...> wrote:
?
Hi,
this guy means he has !!!!
I do not know if he realy has ??!
Herbert
|
On Tue, 25 Sep 2012 16:03:43 -0400, bhaskins <bhaskins@...> wrote: I have a 2221A + 2230(s) & 2232(s).
I think that the are very few, if any differences, within the power supply
sections of these scopes.
There is a lot of very good material available in the archives about
servicing the PS in these and the 2213(A) 2215(A).
If they are dead, it's probably the second place to look anyway.
The first place is the voltage test points.
A short delay after pushing in the power button is normal on all of the
above scopes. There should not be much difference in the power supply because those all use the same main board which includes the power supply and analog signal paths from the inputs to the CRT. Some of the non-DSO 22xx series like the 2225A and I would guess the 2213A and 2215A also use the same main board.
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It says just the operator manual and for $42 which seems expensive to me. On Tue, 25 Sep 2012 21:39:25 +0100, Measurement <measurement@...> wrote: Hi,
this guy means he has !!!!
I do not know if he realy has ??!
Herbert
|
? ? 73, Tim Herrick, KQ8M Charter Member North Coast Contesters kq8m@... ? AR-Cluster V6 kq8m.no-ip.org User Ports: 23, 7373? with local skimmer, 7374 without local skimmer Server Ports: V6 3607, V4 Active 3605, V4 Passive 3606 ?
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Show quoted text
From: TekScopes@... [mailto:TekScopes@...] On Behalf Of David
Sent: Tuesday, September 25, 2012 4:51 PM
To: TekScopes@...
Subject: Re: [TekScopes] 2221a Service Manual? ? It says just the operator manual and for $42 which seems expensive to
me.
On Tue, 25 Sep 2012 21:39:25 +0100, Measurement
<measurement@...> wrote:
>Hi,
>
>this guy means he has !!!!
>
>
>
>I do not know if he realy has ??!
>
>Herbert
|
Yes, operators manual and yes, way too expensive for something that one can find pretty much anywhere. ? 73, Tim Herrick, KQ8M Charter Member North Coast Contesters kq8m@... ? AR-Cluster V6 kq8m.no-ip.org User Ports: 23, 7373? with local skimmer, 7374 without local skimmer Server Ports: V6 3607, V4 Active 3605, V4 Passive 3606 ?
toggle quoted message
Show quoted text
From: TekScopes@... [mailto:TekScopes@...] On Behalf Of David
Sent: Tuesday, September 25, 2012 4:51 PM
To: TekScopes@...
Subject: Re: [TekScopes] 2221a Service Manual? ? It says just the operator manual and for $42 which seems expensive to
me.
On Tue, 25 Sep 2012 21:39:25 +0100, Measurement
<measurement@...> wrote:
>Hi,
>
>this guy means he has !!!!
>
>
>
>I do not know if he realy has ??!
>
>Herbert
|
Been a few months since you posted this but thanks to another group
member who loaned me his copy to scan over Xmas we now have the
Service manual for the 2221A available
Contact me off list manuals@... or visit our web site
for details
Dave
ArtekManuals.com
On 9/24/2012 9:33 PM, KQ8M wrote:
?
Is it just me or is the service manual for a 2221a scope
next to impossible to find? I have been searching google
all evening and have only found the 2221 service manuals
for the 60 MHz scope and not the 2221a 100 MHz scope.
--
Dave Henderson
Manuals@...
PO Box 175
Welch,MN 55089
651-269-4265
|
David Hess