Large amount of Drake gear in latest Schulman web auction
David Schulman has a new web auction up (bidding starts in a couple of days) and it includes a LOT of Drake gear including a TR-7 Service kit. The latter seems to include extender boards, etc.
The link to the auction is:
?
Dave, in my opinion, is definitely one of the good guys and I have no qualms in recommending him.
Bob Groh, WA2CKY
Blue Springs, Missouri?
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Re: B-line out of storage after 30 years
Hi Harold,
I was curious about the progress you made in bringing the B Twins back from storage. Did you replace the electrolytic caps with one of the upgrade kits? What issues have you run into since you started the project?
I wanted to share my recent experience and see if we had similar experience.
R-4B
The R-4B came back to life immediately after some inspection and cleaning. I cleaned the contacts in the band switch and used fader cleaner on some of the pots. The only issue I ran into was wonky behavior in the S meter. I eventually traced this to a bent pin in a 12AU6 vented it from being seated properly. I had to go through the alignment procedure for the S-meter which was very simple.
T-4XB
The T-4XB also came back to life after some inspection and cleaning. I still need to make another pass on the band switches as I have poor connection on some of the bands. 80 and 40 meters load up with no issue, but I discovered alignment issues on 15 and 20 meters. I don't remember having these issues 30 years ago when I last had QSOs with this rig. All the voltages check out with the PS-4 so, I am guessing the characteristics of the 6JB6s changed, but I really don't know the reason. The alignment procedure seems straight forward so I will tackle that next.
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It¡¯s just one large decal. I just pulled the backing off and stuck it on. Then used a razor blade to cut out the holes for the pots?
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On Mar 26, 2021, at 8:54 AM, Steve Bookout, NR4M <steve@...> wrote:
? You should have labeled the gain knob to go to ¡®11¡¯. It would make louder!
Seriously thanks for the tip on the labeling.? Is that one large overlay, or individual ones for each knob?
73 de Steve NR4M? On Mar 26, 2021, at 9:45 AM, Brian Smith <k9bps@...> wrote:
? I used Inkscape software. It¡¯s free. There¡¯s a free knob scale plugin for it. Saved that to a .SVG file and emailed it to a local print shop. They printed it to a clear matte material (could have done glossy). I wanted it to look nice On Mar 26, 2021, at 8:20 AM, n4buq <n4buq@...> wrote:
? Very nice job, Brian. ?Curious: How did you do the lettering?Thanks,Barry - N4BUQ----- Original Message -----From: "Brian Smith" <k9bps@...>
To: [email protected]
Sent: Friday, March 26, 2021 8:09:19 AM
Subject: Re: [DRAKE-RADIO] Preamp
Thanks! It was an endeavor but I¡¯m pleased with how it turned out. Despite
all my messy wiring inside, it¡¯s very quiet noise wise
Brian Smith
On Mar 26, 2021, at 7:50 AM, Dexter Francis via groups.io
<dwmfrancis@...> wrote:
?Nice Job Brian!
I have a project like this sitting in the ¡°someday¡± que. You¡¯ve given my
motivation a boost.
-df
On Mar 25, 2021, at 10:28 PM, VE7PS <ve7ps@...> wrote:
Nice job Brian! ?Looks like an L-7-PS! ?As a multi Strat player/owner I
get it! Been wanting to re-create a Fender amp someday.
73
Peter
VE7PS
On 2021-03-25 6:23 p.m., Brian Smith wrote:
Pardon me. This isn¡¯t exactly Drake. I just finished my first build from
scratch. A tube bass guitar preamp. Since I love Drake gear, I decided
to make it remotely resemble an AC4 or L4PS. Two 12AX7s and one 12DW7.
Just wanted to share it.
Brian Smith
|
You should have labeled the gain knob to go to ¡®11¡¯. It would make louder!
Seriously thanks for the tip on the labeling.? Is that one large overlay, or individual ones for each knob?
toggle quoted message
Show quoted text
On Mar 26, 2021, at 9:45 AM, Brian Smith <k9bps@...> wrote:
? I used Inkscape software. It¡¯s free. There¡¯s a free knob scale plugin for it. Saved that to a .SVG file and emailed it to a local print shop. They printed it to a clear matte material (could have done glossy). I wanted it to look nice On Mar 26, 2021, at 8:20 AM, n4buq <n4buq@...> wrote:
? Very nice job, Brian. ?Curious: How did you do the lettering?Thanks,Barry - N4BUQ----- Original Message -----From: "Brian Smith" <k9bps@...>
To: [email protected]
Sent: Friday, March 26, 2021 8:09:19 AM
Subject: Re: [DRAKE-RADIO] Preamp
Thanks! It was an endeavor but I¡¯m pleased with how it turned out. Despite
all my messy wiring inside, it¡¯s very quiet noise wise
Brian Smith
On Mar 26, 2021, at 7:50 AM, Dexter Francis via groups.io
<dwmfrancis@...> wrote:
?Nice Job Brian!
I have a project like this sitting in the ¡°someday¡± que. You¡¯ve given my
motivation a boost.
-df
On Mar 25, 2021, at 10:28 PM, VE7PS <ve7ps@...> wrote:
Nice job Brian! ?Looks like an L-7-PS! ?As a multi Strat player/owner I
get it! Been wanting to re-create a Fender amp someday.
73
Peter
VE7PS
On 2021-03-25 6:23 p.m., Brian Smith wrote:
Pardon me. This isn¡¯t exactly Drake. I just finished my first build from
scratch. A tube bass guitar preamp. Since I love Drake gear, I decided
to make it remotely resemble an AC4 or L4PS. Two 12AX7s and one 12DW7.
Just wanted to share it.
Brian Smith
|
So is that a wet decal or did you use a separate adhesive? It certainly looks nice. I've known folks who can use a Leroy lettering tool to do things like that with ink but I don't have one of those (used one a LOT back in the day) and not sure if I would want to take that much time and effort anymore.
Thanks,
Barry - N4BUQ
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Show quoted text
----- Original Message ----- From: "Brian Smith" <k9bps@...>
To: [email protected]
Sent: Friday, March 26, 2021 8:42:48 AM
Subject: Re: [DRAKE-RADIO] Preamp
I used Inkscape software. It¡¯s free. There¡¯s a free knob scale plugin for it.
Saved that to a .SVG file and emailed it to a local print shop. They printed
it to a clear matte material (could have done glossy). I wanted it to look
nice
Brian Smith
On Mar 26, 2021, at 8:20 AM, n4buq <n4buq@...> wrote:
?Very nice job, Brian. Curious: How did you do the lettering?
Thanks,
Barry - N4BUQ
----- Original Message -----
From: "Brian Smith" <k9bps@...>
To: [email protected]
Sent: Friday, March 26, 2021 8:09:19 AM
Subject: Re: [DRAKE-RADIO] Preamp
Thanks! It was an endeavor but I¡¯m pleased with how it turned out. Despite
all my messy wiring inside, it¡¯s very quiet noise wise
Brian Smith
On Mar 26, 2021, at 7:50 AM, Dexter Francis via groups.io
<dwmfrancis@...> wrote:
?Nice Job Brian!
I have a project like this sitting in the ¡°someday¡± que. You¡¯ve given my
motivation a boost.
-df
On Mar 25, 2021, at 10:28 PM, VE7PS <ve7ps@...> wrote:
Nice job Brian! Looks like an L-7-PS! As a multi Strat player/owner I
get it! Been wanting to re-create a Fender amp someday.
73
Peter
VE7PS
On 2021-03-25 6:23 p.m., Brian Smith wrote:
Pardon me. This isn¡¯t exactly Drake. I just finished my first build
from
scratch. A tube bass guitar preamp. Since I love Drake gear, I decided
to make it remotely resemble an AC4 or L4PS. Two 12AX7s and one 12DW7.
Just wanted to share it.
Brian Smith
|
I used Inkscape software. It¡¯s free. There¡¯s a free knob scale plugin for it. Saved that to a .SVG file and emailed it to a local print shop. They printed it to a clear matte material (could have done glossy). I wanted it to look nice
toggle quoted message
Show quoted text
On Mar 26, 2021, at 8:20 AM, n4buq <n4buq@...> wrote:
? Very nice job, Brian. ?Curious: How did you do the lettering?Thanks,Barry - N4BUQ----- Original Message -----From: "Brian Smith" <k9bps@...>
To: [email protected]
Sent: Friday, March 26, 2021 8:09:19 AM
Subject: Re: [DRAKE-RADIO] Preamp
Thanks! It was an endeavor but I¡¯m pleased with how it turned out. Despite
all my messy wiring inside, it¡¯s very quiet noise wise
Brian Smith
On Mar 26, 2021, at 7:50 AM, Dexter Francis via groups.io
<dwmfrancis@...> wrote:
?Nice Job Brian!
I have a project like this sitting in the ¡°someday¡± que. You¡¯ve given my
motivation a boost.
-df
On Mar 25, 2021, at 10:28 PM, VE7PS <ve7ps@...> wrote:
Nice job Brian! ?Looks like an L-7-PS! ?As a multi Strat player/owner I
get it! Been wanting to re-create a Fender amp someday.
73
Peter
VE7PS
On 2021-03-25 6:23 p.m., Brian Smith wrote:
Pardon me. This isn¡¯t exactly Drake. I just finished my first build from
scratch. A tube bass guitar preamp. Since I love Drake gear, I decided
to make it remotely resemble an AC4 or L4PS. Two 12AX7s and one 12DW7.
Just wanted to share it.
Brian Smith
|
Very nice job, Brian. Curious: How did you do the lettering?
Thanks,
Barry - N4BUQ
toggle quoted message
Show quoted text
----- Original Message ----- From: "Brian Smith" <k9bps@...>
To: [email protected]
Sent: Friday, March 26, 2021 8:09:19 AM
Subject: Re: [DRAKE-RADIO] Preamp
Thanks! It was an endeavor but I¡¯m pleased with how it turned out. Despite
all my messy wiring inside, it¡¯s very quiet noise wise
Brian Smith
On Mar 26, 2021, at 7:50 AM, Dexter Francis via groups.io
<dwmfrancis@...> wrote:
?Nice Job Brian!
I have a project like this sitting in the ¡°someday¡± que. You¡¯ve given my
motivation a boost.
-df
On Mar 25, 2021, at 10:28 PM, VE7PS <ve7ps@...> wrote:
Nice job Brian! Looks like an L-7-PS! As a multi Strat player/owner I
get it! Been wanting to re-create a Fender amp someday.
73
Peter
VE7PS
On 2021-03-25 6:23 p.m., Brian Smith wrote:
Pardon me. This isn¡¯t exactly Drake. I just finished my first build from
scratch. A tube bass guitar preamp. Since I love Drake gear, I decided
to make it remotely resemble an AC4 or L4PS. Two 12AX7s and one 12DW7.
Just wanted to share it.
Brian Smith
|
Thanks! It was an endeavor but I¡¯m pleased with how it turned out. Despite all my messy wiring inside, it¡¯s very quiet noise wise?
toggle quoted message
Show quoted text
On Mar 26, 2021, at 7:50 AM, Dexter Francis via groups.io <dwmfrancis@...> wrote:
? Nice Job Brian!
I have a project like this sitting in the ¡°someday¡± que. You¡¯ve given my motivation a boost.
-df On Mar 25, 2021, at 10:28 PM, VE7PS < ve7ps@...> wrote:
Nice job Brian!? Looks like an L-7-PS!? As a multi Strat
player/owner I get it! Been wanting to re-create a Fender amp
someday.
73
Peter
VE7PS
On 2021-03-25 6:23 p.m., Brian Smith
wrote:
Pardon me. This isn¡¯t exactly Drake. I just finished my first
build from scratch. A tube bass guitar preamp. Since I love Drake
gear, I decided to make it remotely resemble an AC4 or L4PS. Two
12AX7s and one 12DW7. Just wanted to share it.?
|
Nice Job Brian!
I have a project like this sitting in the ¡°someday¡± que. You¡¯ve given my motivation a boost.
-df
toggle quoted message
Show quoted text
On Mar 25, 2021, at 10:28 PM, VE7PS < ve7ps@...> wrote:
Nice job Brian!? Looks like an L-7-PS!? As a multi Strat
player/owner I get it! Been wanting to re-create a Fender amp
someday.
73
Peter
VE7PS
On 2021-03-25 6:23 p.m., Brian Smith
wrote:
Pardon me. This isn¡¯t exactly Drake. I just finished my first
build from scratch. A tube bass guitar preamp. Since I love Drake
gear, I decided to make it remotely resemble an AC4 or L4PS. Two
12AX7s and one 12DW7. Just wanted to share it.?
|
Thanks. This was based off a Marshall jcm. Found the schematic online. I can share it if you¡¯d like
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Show quoted text
On Mar 25, 2021, at 11:28 PM, VE7PS <ve7ps@...> wrote:
?
Nice job Brian!? Looks like an L-7-PS!? As a multi Strat
player/owner I get it! Been wanting to re-create a Fender amp
someday.
73
Peter
VE7PS
On 2021-03-25 6:23 p.m., Brian Smith
wrote:
Pardon me. This isn¡¯t exactly Drake. I just finished my first
build from scratch. A tube bass guitar preamp. Since I love Drake
gear, I decided to make it remotely resemble an AC4 or L4PS. Two
12AX7s and one 12DW7. Just wanted to share it.?
|
Re: L75 Amp Main Power Switch Availability
I'm not going to waste time debating trivia with you. I just don't want the audience to get the impression that the L-4B is some pathetic POS that doesn't even deserve to be on 11 Meters based on your rantings. The fact is that a countless number of these amps have been in service for decades and they do the job they were intended to do as-is. 73 -Jim NU0C On Tue, 23 Mar 2021 08:51:49 -0700 "Jim VE7RF" <jim.thom@...> wrote: On Sun, Mar 14, 2021 at 08:21 PM, Jim Shorney wrote:
<Hmm... They survived through three engineering generations and served the
purpose over the decades of real world use. Real HV fuses are expensive
for a new build. Even the great W8JI <espouses the use of fault limiting
resistors, although he prefers higher values.
<73
<-Jim
<NU0C
##? ?You won't see any amps other than drake, using a .82 ohm? @? 2 watt? resistor.....for a... 'hv? fuse'.? ?New, correctly sized? HV? fuses are cheap, and meet? ?UL /? CSA? standards.? ?Drake could have bought thousands of em? at whole sale prices.? ?W8JI? typ will use 10 ohm,? or? 20? ohm max, for the? current limiting resistor (aka...'glitch resistor').? ?ARRL handbook? sez to use? 10-15 ohms? per KV.? ?After building? 38? x hb? B+? supplies over the years, and experimenting with different value glitch resistors,? I settled on? 50 ohms, regardless of the? actual? B+? value.? ?But it's a two edged sword.? ?Higher values will limit fault current to a lower value.... BUT dissipate more heat, depending on? mode, and how much average plate current involved.? ?Higher value? glitch resistors? also have a higher? V drop? across them...? ( which will increase even more, with higher plate currents).
##? In? L4B? size amps,? ?with say? 2650 vdc no load..and a fault occurred,? it's then just 2650 /? 50 ohms =? ? 53 amps of fault current.? And? ?53 amps of fault current will open off that? BUSS? 750 ma HV fuse in? < 2 msecs? every time.? ?On a L4B, with? 800 ma peaks on? ssb,? the? V drop on peaks is .8? X? 50 ohms? = 40 vdc? V drop on the loaded? B+.? ? Average plate current on ssb mode is? typ? 400 ma( with processing).? ?(.4 X.4 )? ?X 50 ohms =? ? 8 watts dissipation? in the? 50 ohm glitch R.? ?( and? 32 watts if a? 800 ma? dead cxr, like tuning up with a cxr).? ?Hence my use of a? simple? 50 ohm, 50 watt wire wound? for the glitch? R.
##? On the bigger? HB? B+? supplies, with a lot more filter C,? ?I use globar type AS? resistors.? The? AS types are designed for glitch service, and will handle a lot of joules of? energy...and also a lot of HV.? Typ,? 4 x 200 ohm, type? AS? resistors are wired in parallel..and also fan cooled.? ?But that's what's required for 5-8 kv dc? supplies..and tubes that? suck 1.5? to 3 amps of plate current.? ?3 amps? ccs? into 50 ohms? =? ?450 watts, which is a bunch.? The type? AS? resistors are? 18"? long x 1.5"? diam,? rated for? 225 watts each /? 900 w? total.? They run hot when used in ccs modes.? ?Lower? duty cycle modes like? ssb is a non issue,? only? ?1/4 the? dissipation...same as? the 50 ohms used in the? L4B? B+? supply.
Jim? VE7RF
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Wow!? OK no excuses but time now...I have to build one of these!
73
Peter
VE7PS
On 2021-03-25 8:12 p.m., wb6ogd wrote:
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Show quoted text
On Thu, Mar 25, 2021 at 05:31 PM, VE7PS wrote:
...as WB6OGD has come up with an el-cheapo modern
equivalent of the Drake FS-4 frequency synthesizer that you can
build easily for about $30.?
As Peter says, no need for xtals anymore, The SPR-4 would be
great to have..wish I could find a cheap one!?
And, I have the FS-4 cost down to more like $11 now,? hi hi.
I think we could even add passband tuning... the Si5351
synthesizer we use actually has 3 outputs and we are only using
one for the band crystal
frequency.? Another could replace the BFO and with some Arduino
code, we could vary both, one up and the other down...? PASSBAND
TUNING!
And, by counting the PTO frequency and coding, we could send an
Injection signal to the T-4X without need for the Drake
transceive adapter.
73,
Gary
WB6OGD
|
Nice job Brian!? Looks like an L-7-PS!? As a multi Strat
player/owner I get it! Been wanting to re-create a Fender amp
someday.
73
Peter
VE7PS
On 2021-03-25 6:23 p.m., Brian Smith
wrote:
toggle quoted message
Show quoted text
Pardon me. This isn¡¯t exactly Drake. I just finished my first
build from scratch. A tube bass guitar preamp. Since I love Drake
gear, I decided to make it remotely resemble an AC4 or L4PS. Two
12AX7s and one 12DW7. Just wanted to share it.?
|
On Thu, Mar 25, 2021 at 05:31 PM, VE7PS wrote:
...as WB6OGD has come up with an el-cheapo modern equivalent of the Drake FS-4 frequency synthesizer that you can build easily for about $30.?
As Peter says, no need for xtals anymore, The SPR-4 would be great to have..wish I could find a cheap one!?
And, I have the FS-4 cost down to more like $11 now,? hi hi.
I think we could even add passband tuning... the Si5351 synthesizer we use actually has 3 outputs and we are only using one for the band crystal
frequency.? Another could replace the BFO and with some Arduino code, we could vary both, one up and the other down...? PASSBAND TUNING!
And, by counting the PTO frequency and coding, we could send an Injection signal to the T-4X without need for the Drake transceive adapter.
73,
Gary
WB6OGD
|
Re: I¡¯ll leave this here...
Welp, someone wanted it.
Thanks,
Barry - N4BUQ
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----- Original Message ----- From: "Steve Wedge, W1ES/4 via groups.io" <w1es@...>
To: [email protected]
Sent: Thursday, March 25, 2021 9:17:04 PM
Subject: Re: [DRAKE-RADIO] I¡¯ll leave this here...
Someone adapted. It¡¯s that simple.
73,
Steve Wedge, W1ES/4
Time flies like an arrow. Fruit flies like a banana.
Sent from ProtonMail Mobile
On Thu, Mar 25, 2021 at 11:34, n4buq <n4buq@...> wrote:
It does make me wonder how that came to be. If that was a retrofit, then
I'd think the original meter had a different hole pattern but maybe not.
Thanks,
Barry - N4BUQ
----- Original Message -----
From: "Joe Wolfe" <w7rkn.7@...>
To: [email protected]
Sent: Thursday, March 25, 2021 10:30:21 AM
Subject: Re: [DRAKE-RADIO] I¡¯ll leave this here...
WOW¡..I have never seen a W4 with that meter!
Joe ¨C W7RKN
From: [email protected] [mailto:[email protected]] On Behalf Of
Steve
Wedge, W1ES/4 via groups.io
Subject: [DRAKE-RADIO] I¡¯ll leave this here...
Such a deal! Gave me a chuckle.
<>
Steve Wedge, W1ES/4
|
Re: I¡¯ll leave this here...
Someone adapted. It¡¯s that simple.?
73,
Steve Wedge, W1ES/4
Time flies like an arrow.? Fruit flies like a banana.
Sent from ProtonMail Mobile
On Thu, Mar 25, 2021 at 11:34, n4buq < n4buq@...> wrote: It does make me wonder how that came to be. If that was a retrofit, then I'd think the original meter had a different hole pattern but maybe not.
Thanks,
Barry - N4BUQ
----- Original Message -----
> From: "Joe Wolfe" <w7rkn.7@...>
> To: [email protected]
> Sent: Thursday, March 25, 2021 10:30:21 AM
> Subject: Re: [DRAKE-RADIO] I¡¯ll leave this here...
>
> WOW¡..I have never seen a W4 with that meter!
>
>
>
> Joe ¨C W7RKN
>
>
>
> From: [email protected] [mailto:[email protected]] On Behalf Of Steve
> Wedge, W1ES/4 via groups.io
> Subject: [DRAKE-RADIO] I¡¯ll leave this here...
>
>
>
> Such a deal! Gave me a chuckle.
>
>
>
> https://www.ebay.com/itm/Rare-Vintage-Drake-W-4-ham-radio-wattmeter-W4-/184726059567
> <https://www.ebay.com/itm/Rare-Vintage-Drake-W-4-ham-radio-wattmeter-W4-/184726059567?_trksid=p2349624.m46890.l49292>
>
>
>
> Steve Wedge, W1ES/4
>
>
>
>
>
>
>
>
>
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Re: I¡¯ll leave this here...
Finally, a post from someone who gets it.?
Steve Wedge, W1ES/4
Time flies like an arrow.? Fruit flies like a banana.
Sent from ProtonMail Mobile
On Thu, Mar 25, 2021 at 11:30, Joe Wolfe < w7rkn.7@...> wrote: WOW¡..I have never seen a W4 with that meter! ? Joe ¨C W7RKN ? ? Such a deal! ?Gave me a chuckle.?
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Re: I¡¯ll leave this here...
Please don¡¯t use the word, ¡°greed¡±.?
The market has adjusted to the conditions.?
There are no hamfests; there are virtually no cheap venues to sell items. Selling via eBay costs money and labour.?
Nobody wants to work for free.?
Selling via eBay adds 20%, plus shipping.?
At any rate, a price for an item is what a willing buyer and seller are willing to exchange at.?
73,
Steve Wedge, W1ES/4
Time flies like an arrow.? Fruit flies like a banana.
Sent from ProtonMail Mobile
On Thu, Mar 25, 2021 at 10:47, Billy NN5EE via groups.io < bb99olreg@...> wrote: [Edited Message Follows]
Typical Ebay these days as previous threads indicated. Read this article--??- this morning. Apart from the greed that Ebay shows today Covid has altered the landscape of global commerce to the point that interactive industries are adversely impacted. The HR used rig markets are potentially impacted also. Can't wait for the day when I can attend hamfests even with mask. Vacinated and ready!
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I have had my SPR-4 for about 20 years and the SPR-4 is a great receiver with low current drain if the dial lights are turned off. Be prepared to pay for any additional crystals that you might need or want. A frequency synthesizer is also an option.
Dan Steinhoff - W7UP
|
Pardon me. This isn¡¯t exactly Drake. I just finished my first build from scratch. A tube bass guitar preamp. Since I love Drake gear, I decided to make it remotely resemble an AC4 or L4PS. Two 12AX7s and one 12DW7. Just wanted to share it.?
|
Bob Groh wa2cky
Jim Shorney
Gary WB6OGD
Dan Steinhoff - W7UP