I have the following crystals for the R-4B for sale:
34.6
37.6
38.1
17.6
14.1
38.6
$10.00 each
Please respond off list if interested.
73's
Bill Ellis, WB9CAC___
Drakelist mailing list
Drakelist@zerobeat.net
http://mailman.zerobeat.net/mailman/listin
How is the slug in the r-4B notch adjustment adjusted. From the rear of the
can? Can’t see in there, and haven’t found a tool yet that will grab anything.
Or is it done with the little spring tail that connects to the notch control?
Thanks … Grant NQ5T
___
I got my two new 6BZ6's today and put one each in my two R-4B's.
My station receiver's performance has improved dramatically. I now get
background noise that is believable compared to what I see on my K3/P3. The
roughness seems to be gone, but I'll wait before pronouncing a cure on that due
t
Thanks to all that responded the the other day to my inquiry about the R-4B
issue. This morning I pulled the bottom cover to look at the voltages. All
voltages and percent of ripple were ok with the exception of the BIAS.
Looks like Garey pinpointed the issue, the BIAS cap has failed. Here's an
ima
Rick -
Sounds like the BIAS supply filter cap. Dunno why it would 'fix itself', so might be a bad ground
connection on the supply. Check the screws in the ground terminals on the Power supply board. It's
good practice to go all over the radio and tighten ALL ground screws. Most of the card
73,
Lee
-Original Message-
From: Larry Mccabe
To: Rick Gunderman
Cc: drakelist
Sent: Thu, Feb 2, 2012 2:08 pm
Subject: Re: [Drakelist] R-4B Issue
had a sim situation with my r4c.. small amount of deoxit on the tube
pins and
switch contacts seemed to have solved the prob
Sent fro
had a sim situation with my r4c.. small amount of deoxit on the tube pins and
switch contacts seemed to have solved the prob
Sent from my iPhone
On Feb 2, 2012, at 1:30 PM, Rick Gunderman wrote:
> Yesterday I received the 32.1 Mhz crystal for the R-4B. I replaced the
> crystal, turned the rec
Yesterday I received the 32.1 Mhz crystal for the R-4B. I replaced the
crystal, turned the receiver on and shortly thereafter 15 meters was
working just fine. I had a few projects to accomplish in the shack and I
decided to let the R-4B cook for a while. After about an hour my audio
began to sound
Anyone ...
Need a schematic for Drake R-4B S/N 9129.
I have a R-4A S/N 5900
R-4B S/N 9129
R-4B S/N 10851
The R-4A and early R-4B both exibit the issue of clicking on loud
signal with NB off if you tune the opposite SB (Or a loud sig. next to
the one you want does that for you)
I can not test
took a cursory glance at the innards
when I was adjusting the Allen screw.
Maybe this weekend - though the wx is supposed to be way too nice for me to be
inside!
Steve, W1ES/4
-Original Message-
>From: Garey Barrell
>Sent: Jan 5, 2012 10:02 PM
>To: Steve Wedge , drakelist
>Su
Steve -
I'm not sure, and it's too late tonight to think about it cogently, but keep in mind that you are
NOT trying to change the resonance, merely 'slide' the range along the length of the coil. Sorta
like passband tuning. You may indeed need a little more capacitance to 'move' the range DO
I set the zero point at 0 on the dial scale. My calibrator is spot-on, but I
did rely on also spotting it with my K3 at the upper end, due to the
discrepancy and the calibrator's 25 kHz spacing.
Actual Indicated
0 0
100k 105.5k
200k 210k
300k
My "demodded" Drake R-4B is sold pending payment.
I'll be looking for more restoration projects at Benson (NC, Nov 20th)! I seem
to be settling into working on Drakes and this burden is fitting to me well.
I'm considering my "hobby-job" to be finding more tired Drake rigs and
rejuvenating the
;m sure someone else will check-in
with those values.
Good luck & 73...
Steve Wedge, W1ES/4
To be is to do - Socrates
To do is to be - Plato
Do be do be do. - Sinatra
All my computers have my signature with various pearls of wisdom appended
thereto.
From: J G
Sent: Wednesday, November
Probably the "inj" level is higher from the T4X. Might need to investigate
the R4B mixers.
JB
From: drakelist-boun...@zerobeat.net [mailto:drakelist-boun...@zerobeat.net]
On Behalf Of J G
Sent: Thursday, 10 November 2011 9:29 AM
To: drakelist@zerobeat.net
Subject: [Drakelist
Hi,
Now that 10 is alive and well, I decided to put the B line (T-4XB, R-4B) on 10.
Hasn't been there in a long time.
The low sensitivity part:
The R-4B has low sensitivity on 10. I do not recall that from 20 some years ago
when I was last on 10 with it.
Using the R-4B to control, the calibr
All my computers have my signature with various pearls of wisdom appended
thereto.
From: Bob
Sent: Friday, November 04, 2011 8:30 PM
To: Steve Wedge ; Pete Juliano ; Drake List
Subject: Re: [Drakelist] R-4B Mod removal, Part 1
Hi Steve and Pete, I too have one of these R4B modified receivers.
-
From: Steve Wedge
To: Pete Juliano ; Drake List
Sent: Thursday, November 03, 2011 8:33 AM
Subject: Re: [Drakelist] R-4B Mod removal, Part 1
Yep - I confirmed the 150-ohm is sitting there, off to the side. I haven't
looked for the 2.2M yet, but I'm betting that mine
hat wire, so I'll be cutting it and re-soldering tonight.
Steve, W1ES/4
-Original Message- From: Pete Juliano Sent: Nov 2, 2011 9:43 PM To: Steve Wedge , Drake List Subject: Re: [Drakelist] R-4B Mod removal, Part 1
Hi Steve,
Actually I did it all in two days so it was a little
ore.
73's
Pete N6QW
From: Steve Wedge
Sent: Wednesday, November 02, 2011 5:37 PM
To: Drake List
Subject: [Drakelist] R-4B Mod removal, Part 1
I'm not as brave as Pete (N6QW) - if I assume that he restored his R-4B all at
once. Chances are, he didn't, but he did give me a
I'm not as brave as Pete (N6QW) - if I assume that he restored his R-4B all at
once. Chances are, he didn't, but he did give me a darn good road-map. My
first goals for this evening were to check to see if Radio Shack really did
sell long-shafted 10k pots anymore - they do (!) and so I parted
Just did the alignment on R-4B 15533B - sounds great!
I re-capped this one using the Hayseed Hamfest Re-cap Kit; everything fit as it
should and looks great.
This one got a bath and sauna, then re-lube, all tubes checked and an
alignment. The trimmers for 80m were set to tightest, so re-doin
On Oct 30, 2011, at 12:53 AM, Ron Ries wrote:
3) Last question: With RF gain fully CW on the R4B the ambient (no
signal) noise level is 3-4 S units above where the TS-850 and TS-480
indicate the noise level is for the same antenna system (trap dipole
up 27') and RF gain full on. Is this a
Hi All,
I am in the process of restoring one of those R-4B radios that were offered on
this list. I have never owned an R-4B and I have a couple of questions:
First of all, I have the receiver 95% operational.
1) I am used to the S meter on other radios going to full scale when RF gain is
redu
I have for sale a very nice R7 receiver. Fully functional, very clean, 8.5 on
a 10 scale. Asking $1100 plus shipping from 80118. Paypal plus fees or
certified funds. Call or email if interested. 73
K0GFY R. Hunter Ellington
303-454-0543/720-560-8139
P.O. Box 44
Larkspur, CO 80118
_
My refurbishment of R-4B #2 (the un-modified one), took another giant step this
evening when it passed the Smoke Test after its wash and sauna.
I'm listening to it on 20 CW right now and was on 40 SSB earlier. It sounds
good - especially considering I haven't started the performance check and
Hi Steve, Pete, et al,
Business is done differently nowadays--
Based upon Pete's info, and what I subsequently recd from Bob, W9ETA,
the seller for his brother's estate, I thought I committed to buy an
R-4B, fully aware of the need for work on/in it.
Apparently, saying, "I'll take that
Hey, - Pete -
I bought an R-4B and T-4XB from Bob. I was a fairly-early purchaser and was
somewhat disappointed because they were represented as an 8 out of 10. The
transmitters were represented as "maybe not working/untested". The transmitter
was so heavily modified that I consider it to b
can
find it in the archives easier.
73,
Steve, W1ES/4 in rainy NC.
-Original Message-
>From: Garey Barrell
>Sent: Sep 22, 2011 2:42 PM
>To: Steve Wedge
>Cc: drakelist@zerobeat.net
>Subject: Re: [Drakelist] R-4B V8: 6HS6 vs 6AU6
>
>Steve -
>
>Your PTO is on the way
Steve -
Your PTO is on the way back. I finally got the time to pack and ship it. It's been sitting on the
bench, running for the last week or so with the counter on it. It stays within +/- 100 Hz from day
to day, just sitting in the open. I turned the counter so I could see it from my desk
I know the 6HS6 and 6AU6 have the same base and are actually listed as
substitutes for each other. I also know the 6HS6 has higher Gm.
I noticed, when putting this R-4B back together, that the PO put a 6AU6 in V8.
The receiver seems to work fine, so how critical is it using a 6AU6 in V8 (the
My recently-acquired R-4B is now doing transceive duty with my T-4X while the
R-4A awaits PTO redemption.
I found that the PO moved the INJ jack to one of the SPARE locations. Don't
ask me why. Hooked INJ from the T-4X there and Voila! Garey's CD with the
view of the INJ cable clearly showed
quot;Garey Barrell"
To: "Steve Wedge"
Cc:
Sent: Saturday, August 20, 2011 6:06 PM
Subject: Re: [Drakelist] R-4B/T-4X Transcieve - not!
The simple answer is yes, you should be able to transceive either way with
any of the 4 separates.
The receiver should have only a volt or so
tion!
Steve Wedge, W1ES/4
"I can't complain, but sometimes I still do."
- Joe Walsh
If the above message appears, it came from Steve's Son of Laptop!
- Original Message - From: "Garey Barrell"
To: "Steve Wedge"
Cc:
Sent: Saturday, August 20, 2
can't complain, but sometimes I still do."
- Joe Walsh
If the above message appears, it came from Steve's Son of Laptop!
- Original Message -
From: "Garey Barrell"
To: "Steve Wedge"
Cc:
Sent: Saturday, August 20, 2011 5:42 PM
Subject: Re: [Drakelist] R-4B/T
Which way are you trying to go??
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 2-C/2-NT, 4-A, 4-B, C-Line
and TR-4/C Service Supplement CDs
Steve Wedge wrote:
I'm assuming I should be able to operate an R-4B with a T-4X transmitter and be able to use either
VFO.
I haven't pulled the covers off
I'm assuming I should be able to operate an R-4B with a T-4X transmitter and be
able to use either VFO.
I haven't pulled the covers off my recently-acquired R-4B but do notice that
the PO replaced all the RCA connectors on the rear. I have the correct INJ
cable and it works fine with my R-4A
Garey,
Tnx for the great suggestions!
Paul, W9AC
- Original Message -
From: "Garey Barrell"
To:
Sent: Sunday, June 19, 2011 4:57 PM
Subject: Re: [Drakelist] R-4B Notch Backlash & PTO movement
Paul -
Yes, the adjuster for the NOTCH is 'springy' like t
Paul -
Yes, the adjuster for the NOTCH is 'springy' like the Passband Tuner slugs. The backlash is usually
negligible if the cam slider surface is clean and lightly lubricated.
Seems a little strange. Any 'play' in the front ball bearings is adjusted out with the hex set
screw accessible fr
Just noticed two very slight anomalies with my R-4B:
1) There's a small bit of Notch control backlash; and
2) There's a very small amount of VFO knob upward movement but no
side-to-side, nor downward movement. The slight upward movement does not
affect frequency stability.
Is this normal fo
On Sun, 17 Apr 2011 19:33:16 -0700, Richard Knoppow wrote:
> General Radio also made a good low distortion audio
>genrator and harmonic distortion meter.
GR is nice stuff. I spotted a GR decade resistor box in the pile that I forgot
I had when I was looking for the Leader distortion analyzer
- Original Message -
From: "Curt Nixon"
To: "Jim Shorney"
Cc:
Sent: Sunday, April 17, 2011 5:13 PM
Subject: Re: [Drakelist] R-4B audio problem traced to low
beta Q7 (2N3394)
HP had some mighty fine audio distortion analyzers and
reference sine equipment in
On Sun, 17 Apr 2011 20:13:18 -0400, Curt Nixon wrote:
>HP had some mighty fine audio distortion analyzers and reference sine
>equipment in the 60's--we used it on the McIntosh stuff a lot.
>
>600 series if I recall...same size as my RF gen. 19" rack mount..50 Lbs
As I recall, mine are 300-serie
HP had some mighty fine audio distortion analyzers and reference sine
equipment in the 60's--we used it on the McIntosh stuff a lot.
600 series if I recall...same size as my RF gen. 19" rack mount..50 Lbs
Curt
Jim Shorney wrote:
On Sun, 17 Apr 2011 13:07:35 -0700, Dennis Monticelli wrote:
OHHH Yeah...:)
Curt
Jim Shorney wrote:
On Sun, 17 Apr 2011 14:23:02 -0700, Richard Knoppow wrote:
The use of ceramic caps in audio circuits is somewhat
controversial.
Thanks for the info, Richard. There's been a good discussion of this on the
R-390 list recently. I may have
On Sun, 17 Apr 2011 15:27:13 -0700, Dennis Monticelli wrote:
>As I understand it, the only true concern one should have about the ceramics
>is the piezo effect of the high K material. This makes the circuit
>microphonic so unwanted acoustic feedback from the PA can take place. I agree
>that v
PM, Richard Knoppow <1oldle...@ix.netcom.com>wrote:
>
> - Original Message - From: "Jim Shorney"
> To:
> Sent: Sunday, April 17, 2011 12:59 PM
> Subject: Re: [Drakelist] R-4B audio problem traced to low beta Q7 (2N3394)
>
>
>
> On Sun, 17 Apr 2
On Sun, 17 Apr 2011 14:23:02 -0700, Richard Knoppow wrote:
> The use of ceramic caps in audio circuits is somewhat
>controversial.
Thanks for the info, Richard. There's been a good discussion of this on the
R-390 list recently. I may have to go back and re-read some of it.
73
-Jim
--
Ha
- Original Message -
From: "Jim Shorney"
To:
Sent: Sunday, April 17, 2011 12:59 PM
Subject: Re: [Drakelist] R-4B audio problem traced to low
beta Q7 (2N3394)
On Sun, 17 Apr 2011 15:13:23 -0400 (EDT), kc9...@aol.com
wrote:
Very good explanation...I understoof about
On Sun, 17 Apr 2011 13:07:35 -0700, Dennis Monticelli wrote:
>That would be an interesting study, going stage by stage through the audio
>channel of a 4 or 7 series radio. I'll bet that when the R-4B was designed,
>the Drake lab didn't have such a piece of equipment and probably went by ear
>o
Dennis,
Late that night when Garey & I decided to swap the transistor, I gave a
list of the few I had and he said the 2N3393 would be fine...and he was
right on.
Probably any General purpose NPN switching/amp transistor would work
OK...I don't think it's all that critical of a circuit.
73,
Lee
That would be an interesting study, going stage by stage through the audio
channel of a 4 or 7 series radio. I'll bet that when the R-4B was designed,
the Drake lab didn't have such a piece of equipment and probably went by ear
or visuals on a scope. Maybe someone familar with what Drake had to w
I believe it. However, I think it had less to do with the transistor being a
2N3393 and pretty much all due to just having a beta high enough to allow
the transistor stage to bias correctly. Another transistor type with good
beta would have probably worked as well. You kept it "in the family" by
Lee,
Your experience of the having audio that was partially working with evidence
of low gain and distortion jives with a starved bias situation. Thanks for
diving into this problem, Lee, the group has learned something useful from
it.
Garey,
Yes, I remember you suspecting low beta. It turned
On Sun, 17 Apr 2011 15:13:23 -0400 (EDT), kc9...@aol.com wrote:
>Very good explanation...I understoof about 30% of it...but then I am a
>tech., not an engineer. Hi, Hi.
>What made this tough is that Q7 was kind of working...so I was
>checking, replacing everything BUT Q7.
My experience as a te
One more thing to addthe 2N3393 worked super (batter than the
2N3394??)...in fact, at a AF gain setting of 8-9 o'clock...the audio is
very nice at at a good listening levelat 10:00 with the RF gain
down on a noisey band the R-4b really hears well.
73,
Lee
-Original Message-
F
Dennis -
I think the saying is 'even a blind squirrel finds an acorn now and
then, if you put him under an oak tree!" :-)
That's why I suggested Beta, a low B-E current just made it worse. I've
never seen a small signal BJT fail that way, but your explanation makes
sense. I have seen some
Dennis,
Very good explanation...I understoof about 30% of it...but then I am a
tech., not an engineer. Hi, Hi.
Since my friend had loaned the R-4B out for a few years, he does not
know when the problem started, or if it was gradual or all of a sudden.
When we were working on it...Garey rightly
Lee, Garey,
OK. Mystery solved. Curve tracers are wonderful forensic tools.
Lee, when I first looked at the 2N3394 from your R-4B it's I-V curves looked
fine except for a decided dropoff in low current beta. At first I didn't
flag this as a serious issue. The beta of all transistors is a funct
Earlier today , I finished the last set of R-4B mods. Those of you
following my progress, this marks the ten week point of incremental changes.
The last (and final, I swear!) set of modifications:
1) Added the Sherwood PD-4 active product detector; and
2) Replaced the Sherwood AMP-4 audio amp
Finally got around to looking at the S meter drift I reported a while back.
Garey, K4OAH, suggested a gassy V1, V4, or V5. It was definitely V1, the
6BZ6. Tnx Garey!
I was led astray because when I tried several NOS 6BZ6s, the S meter stopped
drifting but it idled at S7 with S meter "zero" c
Still looking for a NOS R-4B panel
I have a new set of R-4B audio mods coming that go one step further than the
Sherwood AMP-4 mod I recently made. I had FAR Circuits make several 4-watt
audio amp boards using a modified SM0VPO design. Ultra low-noise discrete
transistor design in the ga
Paul, that is a great description and what a beutiful chassis!
\Congratulations,
Kris KM2KM
>
I just completed my R-4B modifications. For those not previously tuned
> in, I was interested in adding the Sherwood R-4C power supply and audio
> amp mod to the R-4B. The stock high-voltage divider
Last view of the boards shown below...
http://72.52.250.47/images/R4B-5.jpg
Paul, W9AC
- Original Message -
From: Paul Christensen
To: drakelist@zerobeat.net
Sent: Saturday, March 26, 2011 5:27 PM
Subject: [Drakelist] R-4B Modifications
I just completed my R-4B
I just completed my R-4B modifications. For those not previously tuned in, I
was interested in adding the Sherwood R-4C power supply and audio amp mod to
the R-4B. The stock high-voltage dividers, power transformer, and audio output
tube were all contributing far too much heat for my comfort l
Looking for one of Tony Mills' replacement front panels for the R-4B. If
you have a new one that's excess to your needs, please let me know. Tnx!
Paul, W9AC
___
Drakelist mailing list
Drakelist@zerobeat.net
http://mailman.zerobeat.net/mailman/listi
Thanks to Garey k4oah who suggested I install a 1 Meg resistor to one of
my multimeter probes. Voltage at V3 pin 1 now reads -9 volts. That's
terrific. I will have to drag out my HP410C and see if it still works. Many
thanks
Garey. Doug SWL
___
Doug -
If the receiver is 'working', I believe your problem is with your meter,
not the receiver. You are probably using a DMM with wire leads. The
voltages in the manual were measured with a VTVM, which had a 1M
resistor AT THE PROBE TIP to decouple the lead from the measurement
point. W
International in Oklahoma.
73,
Lee
-Original Message-
From: Don Cunningham
To: wb5hak ; kb2dhg ;
1oldlens1 <1oldle...@ix.netcom.com>; kc9cdt
Cc: drakelist
Sent: Wed, Jan 12, 2011 2:04 pm
Subject: Re: [Drakelist] R-4B 80 meters not working all the time
Lee,
Did yo
Hi to the group. I have just finished refurbishing my 4th R-4B. I have
done the basic work like inspecting all mechanical and electrical connections
for security, tested the tubes and reseated them, checked and cleaned the
switches, and measuring the resistance and voltages at the tubes per
Sent: Wed, Jan 12, 2011 12:34 pm
Subject: Re: [Drakelist] R-4B 80 meters not working all the time
I thought I saw an email recently saying that Peterson Crystal, the
original
makers of the Drake crystals was still in business. I don't have
contact
info. Then, there is always our good old In
I thought I saw an email recently saying that Peterson Crystal, the original
makers of the Drake crystals was still in business. I don't have contact
info. Then, there is always our good old International Crystal right close
to me in Oklahoma City!!! Finest crystals I know of (maybe a little
Garey,
OK Thanks...I just talked to them on the phone...
They can make it and it takes 2 weeeks.
$20.95 each...not bad.
73,
Lee, KC9CDT
-Original Message-
From: Garey Barrell
To: drakelist
Sent: Wed, Jan 12, 2011 9:59 am
Subject: Re: [Drakelist] R-4B 80 meters not working all the time
International Crystal, .
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 2-C/2-NT, 4-A, 4-B, C-Line
and TR-4/C Service Supplement CDs
LOU GIOVANETTI wrote:
come to think about it, This may be the same problem I have been
having? Where can I get replacement crystals for my R-4B?
___
come to think about it, This may be the same problem I have been having?
Where can I get replacement crystals for my R-4B?
On Wed, Jan 12, 2011 at 12:54 AM, Richard Knoppow wrote:
- Original Message - From:
To:
Sent: Tuesday, January 11, 2011 9:35 PM
Subject: [Drakelist] R-4B 80
- Original Message -
From:
To:
Sent: Tuesday, January 11, 2011 9:35 PM
Subject: [Drakelist] R-4B 80 meters not working all the time
Hi everyone,
Well, I think I finally found the problem withthe R-4B 80
meters not working sometimes.
It is the 14.6 crystal after all.
I thought it
Hi everyone,
Well, I think I finally found the problem withthe R-4B 80 meters not
working sometimes.
It is the 14.6 crystal after all.
I thought it was a bandswitch contact and after several days of workig
on this on/offit looks like the crystal.
I swapped a crystal in from a R-4C and now e
Hi Lee.
If I were a betting guy, I would lay odds on the cathode bypass cap as
being the culprit. If I recall, it is one section of the chassis
mounted can in the R4B. You can test the fix very easily by just
paralleling another electrolytic from the cathode to ground and see if
it improves
Hi gang,
OK, I have a R-4B with kind of distorted audio and you have to turn it
up almost max to get good listening level.
I don't have a spare tube (V7)
The resistance of PIN 1 to gnd is 150 ohm and the voltage is 7.6 VDC.
These are out of spec.
What do you think ? is it the tube, or ??
Ju
the leads from the caps, wire in
some smaller replacements, and from the topside you'll never know.
Best of luck.
73,
Evan, K9SQG
-Original Message-
From: Bill Jackson
To: drakelist
Sent: Thu, Jul 8, 2010 9:32 pm
Subject: [Drakelist] R-4B Recap
Greetings,
I am a relat
Greetings,
I am a relative newcomer to boatanchor restoration. So far, the Drakes I have
purchased have only required some basic switch cleaning and "detailing" to
bring them back to their original glory.
I now have an R-4B that requires the installation of a recap kit from the
Hayseed Hamfest.
Russ -
First off, the 6EH5 runs very hot, normally. That said, there are
failure modes that can make it run even hotter! :-)
Resistance readings of power leads aren't of much use, generally.
Depend upon meter type, range used, polarity of leads, condition of
electrolytics, etc., etc
I recently replaced V7 and now I see that the new one is struggling as well.
Very hot and as time goes on receiver gets noisy. I measured the resistance of
the socket and noted pin 6 at 5K ohms versus the spec'd 15K ohms. Any
suggestions on where to look? Thank. Russ
__
- Original Message -
From: "Bill Ellis"
To: "Drakelist Post"
Sent: Sunday, March 21, 2010 6:10 PM
Subject: [Drakelist] R-4B Headphones
Hi all,
I'm looking for an inexpensive set of headphones for my
R-4B. My military surplus pair have died. Any
recomme
Bill - I got mine a couple of years ago from "Califone" a company that makes
audio stuff for school classroomswork good, can't beat the price! See:
http://www.califone.com/products/2924av.php
The 600 ohm mono headphones are Model 2924AVP.
73 - Dino KL0S
On 21Mar2010, at 9:10 PM, Bill Elli
Hi all,
I'm looking for an inexpensive set of headphones for my R-4B. My military
surplus pair have died. Any recommendations?
Thanks,
Bill, WB9CAC
___
Drakelist mailing list
Drakelist@zerobeat.net
http://mailman.zerobeat.net/mailman/list
John -
The 2-B is a tube based oscillator and so uses 32 pF, Parallel resonant
crystals. All but the R-4 in the 4 Series use 20 pF, Series resonant
crystals, (I think.) I can't find my doc with the specs at the moment.
There would be a couple/three kHz difference in the frequency if the
"
I would expect that's right - yup.
From: john
> In my experience, the crystal type is not critical in the Drake rigs. I
> seem to recall ordering a $3 "standard" computer type crystal out of
> mouser/digikey for use in a 2B as I recall, and it worked FB. HC6 or
> smaller, i
In my experience, the crystal type is not critical in the Drake rigs. I
seem to recall ordering a $3 "standard" computer type crystal out of
mouser/digikey for use in a 2B as I recall, and it worked FB. HC6 or
smaller, it doesn't really seem to matter.
John K5MO
Didn't mean to short you Bry on my previous eMail..
You didn't have what I needed at the time I bought mine from West.
About same prices BTW so use a "local" supplier if available!!
Curt
KU8L
Bry Carling wrote:
Oh yes, Russell - absolutely there are alternatives...
My hc6/u crystals are $
20.8 is what you want for 30M. I would suggest putting it in both the
rx and tx so you can work rx or tx or sep vfo op. alot of the good DX
will operate split up or down and having both dials show in relatively
the same position is good.
I work 30M often using the 20.8 xtals.
Got mine very
I've purchased from him in the past and the xtals are great.
Chuck, AC7GZ
Bry Carling wrote:
Oh yes, Russell - absolutely there are alternatives...
My hc6/u crystals are $15.00 each plus $5.00 to $9.00 S&H
Seen here:
http://www.af4k.com/hc6u_crystals.htm
(and I still get some guys moaning abo
Oh yes, Russell - absolutely there are alternatives...
My hc6/u crystals are $15.00 each plus $5.00 to $9.00 S&H
Seen here:
http://www.af4k.com/hc6u_crystals.htm
(and I still get some guys moaning about the price - go figure!)
From: "Hulett, Russell"
> I just contacted Jan Cr
I just contacted Jan Crystals about crystals for my R-4 and T-4XB.
Specifically, was needing one for 80M ( 14.6 mHz ) and thinking of buying 21.1
and 20.8 to try 30M.
The sales person told me their price was $35 each + $10 s&h. Guess won't be
buying many at that price. Any cheaper alternat
Curt -
There is no problem operating the 4 Series twins on 30M, you just have
to use a 20.8 MHz crystal in the transmitter.
You have two choices for the receiver crystal. The 21.1 MHz crystal
works ok in the receiver, but you can't transceive with receiver
control. If you have a 20.8 MHz c
I notice that tables in the manuals list for the 30 meter band that the
appropriate crystal for the R-4 is 21.1 mHz, but for the T-4X the correct
crystal is 20.8 mHz, the 21.1 mHz says not to use between 10.1 and 10.25.
So, I'm guessing operating the 4line twins on 30 meter CW isn't appropriate?
I have some of them available for the Drake 2-A, 2_B, 2_C receivers
as well as for the 4-Line Drake Radios.
All the ones I do have available are listed here:
http://www.af4k.com/hc6u_crystals.htm
73 - Brian, AF4K
> Are the extra band crystals available from ICM or similar suppliers for the
>
Are the extra band crystals available from ICM or similar suppliers for the
R-4B and T-4XB, I am very impressed with the twins I have just bought and want
to be able to extend the ranges.
Are there any issues tuning them up on the warc bands or 160m?
Also if I send the cases back to be refinished
Subject: [Drakelist] R-4b Notch Tuning Tool Identification
Does anyone know what tuning tool is used to adjust T-8 which is the Notch
Filter inductor for the R-4B. Probably is the same for the whole R-4 line
too. It is inside a can and I can not see into it to see if it is a hex
tool, blade or what
Does anyone know what tuning tool is used to adjust T-8 which is the Notch
Filter inductor for the R-4B. Probably is the same for the whole R-4 line
too. It is inside a can and I can not see into it to see if it is a hex
tool, blade or what. It is going to be real hard to get a tool in there
bec
1 - 100 of 202 matches
Mail list logo
