[Drakelist] TR7 Dead Receive revisited

[Drakedude]

The TR7 is alive and well !!

Thanks for all the responses

Here's the dealI removed all the boards ,cleaned & de-ox-ed all the 
terminals..still dead


As I was head scratching I got an email reply that told me check to see 
if the jumper was in between the two RCA jacks (  EXT ANT /  EXT RCVR) 
and then it hit me like a ton o' bricksI had this TR7 lashed up with 
an R7 and there was no jumper between two jacks...seems my 
memory isn't what it used to be!
I had completely forgot about removing the jumper,and when it didn't 
receive,I went into "repair mode" and overlooked the obvious!

Again,thanks to the list for all the great help!!
Thanks again

Paul AD3G

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[Drakelist] TR7 dead receive

[Drakedude]

Took my TR7 that was in temp controlled storage for about one year and 
found I have no receive. Radio worked 100% when put away in closet.
TX works fine,all modes,full output. I get meter deflection when I 
rotate RF gain control .
I have very weak audio of TX signals,no meter deflection when a strong 
signal ( compared to another recvr same antenna)
Filter selection works,as you cab  hear bandwidth narrow with narrow 
filter. PBT works good also.

I removed relay & cleaned contacts to no avail.
All voltages at 10 volts or slightly lower on reg. board.

Any thoughts?

Tnx in advance

Paul AD3G

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[Drakelist] TR4310 front panel

[Drakedude]

I have a new never used front panel for a TR4310. Still in brown wrapper 
from Drake. Excellent condition,never used/installed.

Asking $65.00 plus some help on the shipping Pictures available

Thanks Paul AD3G

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[Drakelist] R7 receiver

[Drakedude]

I see a R7 listed on Ebayhad what is listed as a "FCC" moda 
dimmer control added below bandswitch knob. Description states it dims 
panel lights ( I would assume vfo dial & meter).
Is this something Drake did at factory to R7's ( never saw one 
before),or is it a mod someone did after they bought it?


Just curious

Tnx   Paul

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Re: [Drakelist] TR7 questions

[Drakedude]

Isn't the 4 line PTO different than the 7 line PTO in that there is no 
circuitry for RIT inside PTO in 4 line,later incorporated in 7 line?
5 & 7 line PTO's the same,except for no dial plates on the 5 line,and 
reverse tuning due to Xtal mixing scheme on TR5


Paul  AD3G

gypsym...@aol.com wrote:

Hello to the group.
Have a TR7 ...mid range serial number.
Without tearing a bunch of stuff apart.
 
also have a TR5 and a TR4c,  the question ...is the pto action on 
the 7 stiffer than the other two.  The 5 is like silk and the 4c feels 
just a tad stiffer than the 5.

Per the archives  ..the 7 pto is the same as the 4c, is the 5 the same?
 
Next was a recent  write up on an R7 that said there was a mechanical 
lever to release the gear  on the pto to enable a mechanical alignment 
on the dial.  Is that the same on the TR7?
 
73s  Carl wd8nhk
 



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[Drakelist] FS" HP 410B follow-up

[Drakedude]

Thanks to all who responded (many). It is sold to first response. If 
sale falls through,I'll go down responses in order they were posted.


many Thanks

Paul AD3G

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[Drakelist] FS: HP 410B

[Drakedude]

Not Drake,but useable to the Drake gang:

HP 410B VTVM with leads & RF probe. Works fine and fair cosmetic 
condition. Sorry I don't have a manual for it. Built like a tank. 
Surplus to my needs.


I'd like $65.00 + shipping for it.
Email off-list if interested

Tnx   AD3G

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[Drakelist] MS7 sold

[Drakedude]

Thanks to all who replied

 

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[Drakelist] FS MS7 speaker

[Drakedude]

P75 and two exc. cond MS7's sold   THANK YOU!

 

Still have the MS7 with switch installed in bottom available

 

$75.00 shipped CONUS

 

thanks to ALL who replied

 

Paul AD3G

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[Drakelist] FS three MS7 speakers P 75 phone patch

[Drakedude]

I have three spare MS7 speakers available.

All work like they should,no sticky paint. All look excellent,except one
of the three has a spst switch installed in bottom of cabinet towards
front,I suppose was used with phone patch  (to mute speaker). It is
really not noticable unless you look for it. Easily removed,you'll just
have a spare hole in cabinet bottom.

$90.00 shipped CONUS for either of the first two, $75.00 for the one
with the switch installed (shipped CONUS)

 

Exc. comdition P 75 phone patch,one knob missing aluminum insert

$30.00 shipped  CONUS

 

$250.00 shipped if you want all three MS7s and P 75

Thanks

73 Paul AD3G

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Re: [Drakelist] my opinion

[Drakedude]

I would agree. I've received tremendous help from this list with several
TR7 dilemmas that otherwise had me stumped.
This list is a priceless treasure trove of help when needed.
I don't post very often,but read all the posts and absorb as much as I
can.

Thanks Thom

-Original Message-
From: drakelist-boun...@zerobeat.net
[mailto:drakelist-boun...@zerobeat.net] On Behalf Of Richard J. Fiero II
W5TFW
Sent: Monday, June 15, 2009 4:34 PM
To: drakelist@zerobeat.net
Subject: [Drakelist] my opinion


Thom,

  without this list, I would probably have to sell off my Drakes as I 
would have no clue as to how to keep them up with the vast amount of 
knowledge of the people on this list !


W5TFW


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[Drakelist] TRADE: W4 for a WH7

[Drakedude]

Excellent condition W4 wattmeter,I would like to trade even for a WH7
meter. I no longer have any 4 line gear,so I would like a WH7 to go with
my TR7. No SWR card included.

Interested party(s) email off list

 

Thanks,

Paul

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[Drakelist] RV75 remote VFO FS

[Drakedude]

Excellent cond. RV75 synthesized remote vfo. Includes patch cable & plug
for RIT. No manual,sorry

800.00 OBO 

 

contact off list please

 

Thanks, Paul

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[Drakelist] FS RV75

[Drakedude]

Great condition RV75 synthesized remote vfo for sale. Has RIT cable &
cinch plug for RIT cable.

Sorry,no manual.

Looking for $800.00  or best reasonable offer plus shipping

 

73  Paul   AD3G

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[Drakelist] Swap TR7A for an R7

[Drakedude]

Anyone have an R7 they would like to swap for a factory TR7A..has
everything it's supposed to,fan,aux board,NB,filters,etc. Excellent
condition.

Contact off list

 

Thanks

Paul

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[Drakelist] TR7 tuning issues

[Drakedude]

My TR7 started a new problem today...some bands won't tune
properly.80 mtrs won't go up past 3.500 (using up/down buttons) and
20 meters and 10 meters the display just "runs wild" it keeps climbing
in frequency. PTO tuning has no effect on 20 & 10. No AUX board
installed.

It's as though synthesizer is only partly working,due to some bands work
OK (160,40,15) some half work (80) and two don't work at all (20 & 10)

I reseated all the cards which had no effect. Any thoughts as where to
start looking?

 

Thanks, Paul AD3G

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[Drakelist] SCR PS7

[Drakedude]

Anyone know of a source for the C228F3 SCR in the PS7 ?  

 

Thanks, Paul

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[Drakelist] PS7 parts

[Drakedude]

Anyone know of a good source for the rectifier bridge & regulators for
PS7 ? 

 

Thanks  Paul AD3G

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Re: [Drakelist] Drake PS7 minor ?

[Drakedude]

Yeah...kinda a drab blackish green
 
Paul AD3G

-Original Message-
From: drakelist-boun...@zerobeat.net
[mailto:drakelist-boun...@zerobeat.net] On Behalf Of gypsym...@aol.com
Sent: Monday, March 23, 2009 4:25 PM
To: Drakelist@zerobeat.net
Subject: [Drakelist] Drake PS7 minor ?



Hi to the group,
For those of you who have a PS7 looking at the metal grate cover on the
top...would you call it black or like mine a dull OD  (olive drab)
brown-ish.
Carl WD8NHK
 
PS for those of you who remember my MN2000 ? as to whether it had an
inner coverthe answer was yes...and now I have the original cover in
hand. 


  _  

A Good Credit Score is 700 or Above. See
 yours in just 2 easy steps! 

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Re: [Drakelist] TR7 with Modern Linear

[Drakedude]

I run my TR7 with a QRO Technologies HF2500 (pr of GU74b's) with the ALC
connected and have no problem. I also have the ALC on the TR7 cranked
back somewhat.

Paul AD3G

-Original Message-
From: drakelist-boun...@zerobeat.net
[mailto:drakelist-boun...@zerobeat.net] On Behalf Of Don Cunningham
Sent: Sunday, March 01, 2009 2:03 PM
To: k4...@mindspring.com; drakelist@zerobeat.net
Subject: Re: [Drakelist] TR7 with Modern Linear


Garey, et al,
I tried the "fake ALC" method with my old KWM-380 and an Alpha 91b after

fiddling with ALC on the 91b with little success.  I  had no more
success 
with the fake ALC circuit I found on a site.  While it DID work at
lowering 
the output (that could be witnessed in the CW mode with carrier turned 
down), the Collins had a leading edge spike that was a killer.  The
Alpha 
faulted on that spike, EVERY time.  I have read a few places on the net 
hinting that the same might be true for the TR7.  Anyone had experience
with 
that??  Also, I was reading some time ago that the output of the driver 
board has been successfully used as a "0dbm" input for transverters.  My

thought was to remove the original PA in a TR7, build a small 30 or 40w
amp 
to take it's place and drive the Alpha from that.  I have since sold the

Alpha and the KWM-380, and have a nice 2 tube, 3-500z amp whose ALC
works 
well.  I have NOT tried it as yet with the TR7, hence my question about
the 
"leading edge spike", althought the amp would take it, 150w into this
amp 
will give you 2k into a dummy load, hi.
73 and thanks for your input Garey,
Don, WB5HAK
- Original Message - 
From: "Garey Barrell" 
To: 
Sent: Sunday, March 01, 2009 12:12 PM
Subject: Re: [Drakelist] TR7 with Modern Linear


> Jim -
>
> Some good points there.  However, most are related to the "dynamic"
> action of ALC, NOT a fixed gain adjustment as I described.   I and
> others have used this technique with success for a long time, but 
> there is always new information!
>
> Of course there's always the argument that says "all this for less 
> than one S-Unit?!??"
>
> 73, Garey - K4OAH
> Glen Allen, VA
>
> Drake 2-B, 4-B, C-Line & TR-4/C Service Supplement CDs 
>
>
>
> Jim Shorney wrote:
>> On Sun, 1 Mar 2009 09:26:20 -, John Stringer wrote:
>>
>>
>>> The linear requires only 20watts drive for 400 watts out (our
limit).
>>> In SSB the only output control on the TR7 is the Mic Gain.It is a
real
>>> fiddle to adjust this for 20 watts and more so to keep it there. The
>>> smallest touch on the gain control can double the output and also it

>>> cannot
>>> cope with peaks.
>>> Modern radios have SSB output level separated from Mic Gain.
>>> Any ideas on how to get around this situation?
>>>
>>
>> A couple of things come to mind. Does tha amplifier have an ALC
output?
>> This can be used to limit your drive. You don't mention what kind of
>> amp it is, but if there is no ALC output, you might be able to look
at
>> how Drake implemented the ALC in the L-4B/L-7 and add it to your amp.
>>
>> A power attenuator could be added inline. The difficulties there are
>> that you have to find non-inductive resistors of sufficient power
>> rating to soak up the extra exciter power, and provide T/R switching
>> somewhow.
>>
>> A *good* external RF speech processor (SP75 or equivalent) could be
>> used to limit the output level. I've found that my SP75 does a good
job
>> of limiting the peak output to a certian level. Or you could try
>> adjusting the ALC control inside the rig for 20 watts maximum output.
>> You might have to change some component values in the ALC circuit,
but
>> it should be do-able.
>>
>> The problem with reducing the output from a 150 watt amp to 20 watts
is
>> that you are operating closer to the crossover point of the
>> transistors, and you could have higher IMD on your transmit signal.
>> There can also be also other problems associated with using ALC to
>> control your output level as is done in "modern" rigs:
>>
>> http://www.nitehawk.com/sm5bsz/dynrange/alc.htm
>>
>>  From a spectral purity standpoint, it's probably better to have an
>> attenuator in the input side of the linear than use any of the other
>> methods. The National NCL2000 comes to mind here. The grid circuit is
a
>> 50-Ohm dummy load with two taps - one for high power and one for low
>> power (~20 watts) drive. But that's a grid-driven amp, you may need
>> something a little different if your amp is grounded-grid.
>>
>> 73
>>
>> -Jim
>>
>>
>> --
>> Ham Radio NU0C
>> Lincoln, Nebraska, U.S.S.A.
>> TR7/RV7/R7A/L7, TR6/RV6, T4XC/R4C/L4B, NCL2000, SB104A, R390A, 
>> GT550A/RV550A, HyGain 3750, IBM PS/2 - all vintage, all the time!
>>
>> "Give a man a URL, and he will learn for an hour; teach him to
Google, 
>> and he will learn for a lifetime."
>>
>> HyGain 3750 User's Group - http://groups.yahoo.com/group/HyGain_3750/
>> http://radiojim.exofire.net
>> http://incolor.inetnebr.com/jshorney
>> http://www.nebraskaghosts.org
>>
>>
>>
>> _