RE: [drakelist] TR-4 receive squeal/oscillation

[Chuck Wyatt]

"Chuck Wyatt" <[EMAIL PROTECTED]> made an utterence to the drakelist gang
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Found it.  Loose tube.  I guess it got unseated during shipping.  Sorry
for the bother!

Enjoying the rig now!!

73,

Chuck
KB5GC

-Original Message-
From: Garey Barrell [mailto:[EMAIL PROTECTED] 
Sent: Friday, April 08, 2005 11:46 AM
To: [EMAIL PROTECTED]
Cc: drakelist@www.zerobeat.net
Subject: Re: [drakelist] TR-4 receive squeal/oscillation


Chuck -

Sounds like an oscillation in the RF or IF stages.   This sort of thing 
is almost always the result of dried out electrolytic capacitors in the 
B+ decoupling.

The operation and function of the AC-3 and AC-4 are identical.

Since it worked with HIS power supply (we think?) I would first suspect 
the +250V electrolytics in your supply.  The caps in the bias supply 
could also be questioned since it is used extensively in the AGC 
circuitry.  It's easiest to just shunt the existing caps with whatever 
caps you have that are at least as much capacity and at least as high a 
voltage as the existing caps, leaving the existing ones in place.   When

you find the one(s) that fix the problem, remove the old one and replace

with an appropriate sub.  Never leave an old capacitor in circuit as a 
permanent repair.

There is also an electrolytic inside the TR-4, C135 I think, that 
"might" be down, but since it allegedly worked with another supply, I'd 
start there.

Let us know what you find!

73, Garey - K4OAH
Atlanta

Drake C-Line Service Manual




Chuck Wyatt wrote:

> This may be the same kind of issue as Larry had.  I just bought a
> TR-4, lights up, and I do get power out.  However, on receive, if 
> I open up the RF gain up past the half-way point, I get a loud squeal 
> from the speaker which puts the S-Units at 40 db over.  I can hear 
> signals underneath, so otherwise the receiver is functioning. Seems 
> unrelated to the kind of speaker I've got plugged into it.
>  
> Thanks for any suggestions.  I contacted the seller who said that it
> worked fine with the AC-3 powersupply, and wondered if the AC-4 (which

> I have) has the same pin-outs?
>  
> Chuck
> KB5GC
>
>




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RE: [drakelist] apologyze

[Joe Roth]

"Joe Roth" <[EMAIL PROTECTED]> made an utterence to the drakelist gang
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I found it very funny & enjoyed the error!
Find the humor, don't be overly sensitive.
Joe
Original Message Follows
From: [EMAIL PROTECTED]
Reply-To: [EMAIL PROTECTED]
To: drakelist@www.zerobeat.net, drakelist@www.zerobeat.net
Subject: [drakelist] apologyze
Date: Sat, 09 Apr 2005 09:32:59 +0200
[EMAIL PROTECTED] made an utterence to the drakelist gang
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hello
i read my email that i send to the drakelist this morning.
and du tho my bad english.
i made a mistake.(gay = guy)
i hade no means to insult enyone.
and i hope you get a good laugh at this.
there is one good thing about this.( i need no introduction anymore)
so if i offend enyone i apologyze..
73 bert from holland
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[drakelist] Dayton doings?

[Bob W7AVK]

Bob W7AVK <[EMAIL PROTECTED]> made an utterence to the drakelist gang
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Good Morning DRAKE list - For the first time I will be attending the 
Dayton Hamvention next month.  First time east of the Mississippi in 55 
years.  :-)

I will be staying at the QRPers Four Days In May hotel, but would like 
to attend the Drake related activities as well.  Where, when, and what 
are they?

Thanks,
73  Bob  W7AVK
Home of the TR-7 Service Kit http://www.atnet.net/~rsrolfne
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[drakelist] apologyze

[bert21]

[EMAIL PROTECTED] made an utterence to the drakelist gang
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hello

i read my email that i send to the drakelist this morning.
and du tho my bad english.
i made a mistake.(gay = guy)
i hade no means to insult enyone.
and i hope you get a good laugh at this.
there is one good thing about this.( i need no introduction anymore)

so if i offend enyone i apologyze..

73 bert from holland
 
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