Re: TR4-CW Service Bulletin
On Wed, May 17, 2023 at 07:56 PM, KL7AM wrote:
I have tube boxes that are factory printed 6EV7 6FQ7
?
And they have 6AU6's in them? Hey, You got an antenna for 75/40 up yet? --
73/Rick
WA6III
*Every post is created using Linux
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Re: TR4-CW Service Bulletin
I have tube boxes that are factory printed 6EV7 6FQ7
From: "Steve Wedge, W1ES/4 via groups.io" <w1es@...> To: "DRAKE-RADIO" < [email protected]> Sent: Wednesday, May 17, 2023 12:28:33 PM Subject: Re: [DRAKE-RADIO] TR4-CW Service Bulletin
Interestingly, Drake used the 6FQ7 in their later TR-4C¡¯s and T-4XC¡¯s.?
I have not done any research on new tube availability and prices as they were in the 1970s. It could well be that the bulletin came out prior to Drake deciding to use the 6FQ7¡¯s to replace the 6EV7.?
Because none of these are available as new Production, prices are established by supply and demand of the used and NOS tubes. I¡¯m willing to bet that there are many more 6EV7¡¯s available today. And, as you mention, there¡¯s really not a lot of electronic demand on these tubes, when used as relay controls.?
It¡¯s interesting, nevertheless.?
73, Steve Wedge, W1ES
Time flies like an arrow. Fruit flies like a banana.
Sent from Proton Mail for iOS On Wed, May 17, 2023 at 15:23, Rick WA6III < myr748@...> wrote: On Wed, May 17, 2023 at 02:00 AM, Steve Wedge, W1ES/4 wrote:
Perhaps that wasn¡¯t the case when the bulletin was written.?
?
Steve Wedge, W1ES/4
?
Time flies like an arrow. Fruit flies like a banana.
?
?
Sent from Proton Mail for iOS
?
?
That would make sense I guess.....?
I did do a search of different vacuum tube providers and just all of them listed the 6AQ8? as available but the prices were a little "out there" compared to the 6EV7's I found.? Many (or all) listed the 6EV7 as available too (including used and/or NOS on eBay) starting at $10-15
There's one seller on ebay that's selling 10 NOS 6EV7's for $50 + $10 shipping (+ tax of course)?? Making them about $7 each.
But for a double triode tube that is only used for something as simple as a VOX amp and relay driver, It appears that other subs good choices too.....( 6FQ7, 6GU7 )
?
--
73/Rick
WA6III
*Every post is created using Linux
|
For setting the receiver gain in a 2-B, the manual states to zero the S-Meter. Is that supposed to be "1" on the dial? I know 0 != 1, but the meter doesn't have a zero on it. Is it possible that zero is the extreme left-hand side of the meter (just at the point where the needle hits the stop?
Thanks,
Barry - N4BUQ
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I found I have the MSDS for Tuner-Lub.? Its plain old Vaseline.? Many years ago Boonton Radio published some testing they had done on the oscillator turret switches on the Q-Meter and RX-Meter.? The best material at the time was white silicone grease, known as Lubriplate, second, but by not much, was Vaseline.? My experience is that after through cleaning with Deoxit a very small amount of Vaseline, Applied with a toothpick, will make the contacts stay clean for a long time.? Probably gives some protection against oxidizing.? ?Tuner Lub is somewhat hard to find but petroleum jelly is not. I don't know what exactly the Lubriplate of sixty years ago was but several products come under that name now. Vaseline is still the same old stuff.? Also seems to help with worn switches which have become noisy.
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That should be good enough. It's a digital circuit so it either works or not. If it locks properly across all bands I wouldn't bother. 73 -Jim NU0C On Wed, 17 May 2023 15:56:34 -0700 "jerry-KF6VB" <jerry@...> wrote: Now at the VCO calibration. The manual advises that you don't have to
do it if the unlocked VCO is "about 17MHz" on 20M, and "about 32Mhz" on
15M. Well, those numbers are 18.12MHz and 33.62MHz. So I guess I
should probably do it. Need to get into that area anyway to clean
connectors.
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Re: Drake 7 Series Cabinet Paint
I also have gotten great results with a roller on Drake and Heath radios that did not have a smooth satin finish. The late TR7¡¯s had black cases anyway so it¡¯s pretty authentic to use satin black with the roller.
I use the cheap single-use 4 inch rollers, which don¡¯t shed and leave a manageable paint area to be dealing with at any given time.
I have even considered trying to make up very small rollers so I could touch up dings on front panels.?
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On May 17, 2023, at 10:05 AM, John N9FCA <jmbeattie@...> wrote:
I sanded my MN2000 and sprayed a few coats of primer and a few coats of satin black. I struggled to get a uniform application from the can so decided to try rolling on the final coat. I got a nice stippled finish that I think closely matches the original. Expand the attached photo to see the texture. I used a 4¡± high quality roller (avoids lint) with 3/8¡± nap. Key to a good result is bright lighting all round so you can see that you have rolled consistently on all sides. Get the paint applied uniformly all over first then roll outward to all edges to get a uniform texture. You still have to spray a few coats first to cover certain areas that a roller can¡¯t reach such as the inside of the rolled front edge of the case.
--
73
John?N9FCA
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I¡¯ll have a couple of MN-4 tuners for sale or trade at hamvention. ? They are nice shape, one with orig manual too. ??
Come by and say hello ! ? ?Flea market space
?7275?
hope to see you there !?
Joe K9UR?
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Hello all,
After a week of distraction - repairing an SBE SB-34 - I turned my attention back to the TR7. Time for an alignment. I had set up a proper bench, with a 5-foot shelf for test equipment. I had also
installed an LED tape under the shelf, so the entire bench is bathed in light.
To prepare, I printed out the alignment procedure. I have found two scans of the Service Manual on the net; one is complete but low quality - all the pictures in black & white ( no shades of gray ). The other one is grey-scale with usable pictures; but it is missing the first page of the alignment procedure. So I printed out the first page from one, and the rest of the pages from another.
I also took a picture of the rear circuit boards with the shield panel removed. Printed it on the color laser, and wrote the designators of all the adjustable stuff on the printout. When I opened the radio, I noted a lot of flux on the parent board; A half hour of quality time with Q-tips and IPA made it much nicer.
Getting started, the 10V was 10.35; I set it to 10.00 with my most trustworthy DMM - an almost
new Fluke 87V. That committed me to doing the complete alignment, but I was planning to do that anyway.
My new ( to me ) HP 5385A frequency counter performed admirably for setting the oscillators. Ran into a little problem with the 8.05MHz oscillator; the adjustment cap didn't
have enough range. There's a cap in parallel with it, and the manual advises that you can change that one. 10 caps and 2000 years later, it was dead nuts on. First, I was adjusting it the wrong way - it's subtractive mixing, duhhh. Then with out realizing it, I moved the PBT control in the
heat of battle, and kept adjusting...
One problem was that I didn't have the right size tuning tool for the small adjustable inductors. I used to have every tuning tool known to man, but that was years ago, and they seem to have gradually dribbled away. Back in my misspent youth, I worked in an instrument shop
for a few years, doing repair & calibration.... lots of peaking & tweaking back then!
I discovered that I can tune those cores with one of those screwdrivers with a plastic body & a metal tip; the ones that have an exposed metal tip at one end, and a recessed one at the other end. Two sets of tuning tools on order; one from GC Electronics, and the other one from China Inc.
Luckily, I had replaced all the power supply pots with 10-turn units. Wow, the adjustments are
pretty twitchy. No idea how one could do it with the original 3/4-turn units.
Now at the VCO calibration. The manual advises that you don't have to do it if the unlocked VCO is "about 17MHz" on 20M, and "about 32Mhz" on 15M. Well, those numbers are 18.12MHz and 33.62MHz. So I guess I should probably do it. Need to get into that area anyway to clean connectors.
In addition to the alignment, I have in hand a new 2.7kHz filter from Noble Radio. Going to install that as the default SSB filter and move the stock 2.3 to another slot.
- Jerry, KF6VB
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Points well taken on both sides. But there are scammers from all angles---pros, recreational, mom/pop, simple ops, laypersons ¡. I haven¡¯t sold 20 ham/hifi/electronic items over my 38 years as a ham and into electronic gear¡.so if you are in that league, well continue doing what you are doing. If there is a rig out there for $2000.00 and ships for $25, I am in. That expensive of a rig is gunna be heavy. $100-200-300 boxing, packaging, insurance, shipping depending¡ I think the eBay guy is a lil over the top for his product line and making up product losses on shipping. His fees, in most cases, are all 50% of many ?product values¡? for those reasons, I would never buy from that kind of seller with listings on EPAY! ? ±õ²Ñ±á°¿¡. ? STAY SAFE AND STAY WELL!
Respectfully,
Thomas K. Lanieri, NU2W
NJ Licensed EMT; PHTLS, AMLS, PHPEC B.A.A. EMS Support ARC N.E. BioMedical Services ARC N.E. Disaster Health Services DanaFarber-Am Cancer Society ?
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From: [email protected] < [email protected]> On Behalf Of Steve Wedge, W1ES/4 via groups.io Sent: Wednesday, May 17, 2023 12:09 PM To: [email protected]Subject: Re: [DRAKE-RADIO] NOS TR-4Cw RIT ? Someone doing this as a business isn¡¯t doing chickens#!t stuff like that. They either pay an employee to do it or contract it out to a UPS store or similar. The packing costs almost as much as the shipping, when done right.? People like us selling maybe 10-20 items a year aren¡¯t in the same league as the pros.? If you¡¯re buying a $2000 radio, an extra $25 for shipping isn¡¯t even in the noise.? Time flies like an arrow. Fruit flies like a banana. Sent from Proton Mail for iOS On Wed, May 17, 2023 at 11:43, John K5MO <johnk5mo@...> wrote: Charge USPS/UPS counter rates, and pay PirateShip/commercial account rates. It's a good way to skim a few more bucks from the buyer. ? A flipper indeed¡crazy shipping fees¡NO TU! STAY SAFE AND STAY WELL!
Respectfully,
Thomas K. Lanieri, NU2W
NJ Licensed EMT; PHTLS, AMLS, PHPEC B.A.A. EMS Support ARC N.E. BioMedical Services ARC N.E. Disaster Health Services DanaFarber-Am Cancer Society From: [email protected] <[email protected]> On Behalf Of Chuck Rippel - K8HU and ex - NMN
Sent: Tuesday, May 16, 2023 4:42 PM
To: [email protected]
Subject: Re: [DRAKE-RADIO] NOS TR-4Cw RIT If you go to his E-Bay "store," there are a number of Drake items in "As New" condition. Looks like a radio-flipper to me.
--
"The Constitution does not authorize agencies to use pan-and-phone regulations as substitutes for law passed by the peoples representatives." ~ Justice Gorsech, Concurring Opinion
--
Chuck Rippel, K8HU
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Re: TR4-CW Service Bulletin
Interestingly, Drake used the 6FQ7 in their later TR-4C¡¯s and T-4XC¡¯s.?
I have not done any research on new tube availability and prices as they were in the 1970s. It could well be that the bulletin came out prior to Drake deciding to use the 6FQ7¡¯s to replace the 6EV7.?
Because none of these are available as new Production, prices are established by supply and demand of the used and NOS tubes. I¡¯m willing to bet that there are many more 6EV7¡¯s available today. And, as you mention, there¡¯s really not a lot of electronic demand on these tubes, when used as relay controls.?
It¡¯s interesting, nevertheless.?
73,
Steve Wedge, W1ES
Time flies like an arrow. Fruit flies like a banana.
Sent from Proton Mail for iOS
On Wed, May 17, 2023 at 15:23, Rick WA6III < myr748@...> wrote: On Wed, May 17, 2023 at 02:00 AM, Steve Wedge, W1ES/4 wrote:
Perhaps that wasn¡¯t the case when the bulletin was written.?
?
Steve Wedge, W1ES/4
?
Time flies like an arrow. Fruit flies like a banana.
?
?
Sent from Proton Mail for iOS
?
?
That would make sense I guess.....?
I did do a search of different vacuum tube providers and just all of them listed the 6AQ8? as available but the prices were a little "out there" compared to the 6EV7's I found.? Many (or all) listed the 6EV7 as available too (including used and/or NOS on eBay) starting at $10-15
There's one seller on ebay that's selling 10 NOS 6EV7's for $50 + $10 shipping (+ tax of course)?? Making them about $7 each.
But for a double triode tube that is only used for something as simple as a VOX amp and relay driver, It appears that other subs good choices too.....( 6FQ7, 6GU7 )
?
--
73/Rick
WA6III
*Every post is created using Linux
|
Re: TR4-CW Service Bulletin
On Wed, May 17, 2023 at 02:00 AM, Steve Wedge, W1ES/4 wrote:
Perhaps that wasn¡¯t the case when the bulletin was written.?
?
Steve Wedge, W1ES/4
?
Time flies like an arrow. Fruit flies like a banana.
?
?
Sent from Proton Mail for iOS
?
?
That would make sense I guess.....? I did do a search of different vacuum tube providers and just all of them listed the 6AQ8? as available but the prices were a little "out there" compared to the 6EV7's I found.? Many (or all) listed the 6EV7 as available too (including used and/or NOS on eBay) starting at $10-15 There's one seller on ebay that's selling 10 NOS 6EV7's for $50 + $10 shipping (+ tax of course)?? Making them about $7 each. But for a double triode tube that is only used for something as simple as a VOX amp and relay driver, It appears that other subs good choices too.....( 6FQ7, 6GU7 ) ? --
73/Rick
WA6III
*Every post is created using Linux
|
Re: Buying ham stuff from estate sales
Seller probably thought it was a sealed paint can, not realizing they aren¡¯t sealed due to heating of the oil causing it to expand when used.? ? A friend years ago, who worked at the Heathkit store in Sacramento, told me the number one item being returned, as defective, was the Cantenna as it ¡®leaked¡¯ oil when in use. DUH!!? And this from hams!! ? Joe ¨C W7RKN ? ? From: [email protected] [mailto:[email protected]] On Behalf Of Gregg Lebovitz
Subject: [DRAKE-RADIO] Buying ham stuff from estate sales ? Besides Drake equipment I have bought other ham equipment from estate sales. I bought a cantenna from an estate sale and they packed the whole thing including oil in a box and sent it. I paid $20 including shipping and assumed they removed the oil. What I received was a package that was on oily mess. Had it tested for PCBs and it was negative thank heavens. You need to be careful when buying from non hams.
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Re: a quick tour of the heathkit shop and ham shack
looking for a W4?? Which design?? I may well have it.? I have 7 W4¡¯s, most are early¡¯s, but do have one or two late¡¯s.? (Slightly different graphics on face of ¡®box¡¯.) ? Joe ¨C W7RKN ? From: [email protected] [mailto:[email protected]] On Behalf Of Mark - WB0IQK
Subject: Re: [DRAKE-RADIO] a quick tour of the heathkit shop and ham shack ? No wonder I can't find any W4's at the local fest anymore. You have cornered the market on them.?
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Re: a quick tour of the heathkit shop and ham shack
No wonder I can't find any W4's at the local fest anymore. You have cornered the market on them.?
Mark, WB0IQK
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I purchased my TR4CWrit on eBay almost 10 years ago.? It is a very late serial number (@ 50 or so before the end) and is in almost mint, if not mint, condition; complete with NB.? Came with a AC4 rebuilt with a Heathkit Shop upgrade and a Shure 444 desk mic.....The only thing I did was install a new fuse holder as the old one had broken.
?I use it almost weekly when I NCS the Drake West Coast Net.? Very dependable.
I paid $1200....I guess that would be a fantastic price these days...
A few years after I bought it,? I bought an RV4C on eBay.? Paid $125 for it supposedly working.? It did not work,? but I fixed it in short order and it has worked flawlessly since....
These TR-4CW rigs on ebay have been interesting to me.? I bought one locally about a year ago, a TR-4CW with RIT. ?it is not in good shape, has some rust spots at a couple places on top, and it doesn¡¯t turn on.? The AC-4 needs to be recapped, so it¡¯s hard for me to do much without it.? For various reasons, I¡¯ve decided not to keep it.? A ¡°mint¡± rig went for $2400 a month or so, and the current one seems to be going that way.? On the other hand, one that had a loose mode switch but would turn on just went for $199.95.? That¡¯s so low that fees, packing, and shipping would be a high percentage of the price.
?I sold the rusty RV-4C that came with mine and basically broke even after I agreed on a price and then found out what shipping would be.? The price of shipping has been a game changer for these kinds of rigs, and where I shipped it said they would not provide insurance unless they packed it.? For the RV-4C, that means I would have gone in the hole by quite a bit so I packed it myself.
?The bottom line is that if someone is interested, I would be glad to send pictures and talk about it.? I was the second owner of this rig and should have kept it.? Now, I am again about the fifth owner and would like to see it go where it could be fixed and appreciated. ?
73,
Dennis, W5RZ
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Re: TR4-CW Service Bulletin Upload 2
Thanks!
Steve Wedge, W1ES/4
Time flies like an arrow. Fruit flies like a banana.
Sent from Proton Mail for iOS
On Wed, May 17, 2023 at 12:08, Chuck Rippel - K8HU and ex - NMN < lantareamon@...> wrote: Sure, let me downsize the document a bit. It's attached.
Chuck, K8HU
"
Chuck, can you send this as an attachment? It's way too big as an inline document.
73,
Steve Wedge, W1ES/4"
--
Chuck Rippel, K8HU
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Someone doing this as a business isn¡¯t doing chickens#!t stuff like that. They either pay an employee to do it or contract it out to a UPS store or similar. The packing costs almost as much as the shipping, when done right.?
People like us selling maybe 10-20 items a year aren¡¯t in the same league as the pros.?
If you¡¯re buying a $2000 radio, an extra $25 for shipping isn¡¯t even in the noise.?
My $0.02
73,
Steve Wedge, W1ES/4
Time flies like an arrow. Fruit flies like a banana.
Sent from Proton Mail for iOS
On Wed, May 17, 2023 at 11:43, John K5MO < johnk5mo@...> wrote: Charge USPS/UPS counter rates, and pay PirateShip/commercial account rates. It's a good way to skim a few more bucks from the buyer.
John K5MO
A flipper indeed¡crazy shipping fees¡NO TU! STAY SAFE AND STAY WELL!
Respectfully,
Thomas K. Lanieri, NU2W
NJ Licensed EMT; PHTLS, AMLS, PHPEC B.A.A. EMS Support ARC N.E. BioMedical Services ARC N.E. Disaster Health Services DanaFarber-Am Cancer Society From: [email protected] <[email protected]> On Behalf Of Chuck Rippel - K8HU and ex - NMN
Sent: Tuesday, May 16, 2023 4:42 PM
To: [email protected]
Subject: Re: [DRAKE-RADIO] NOS TR-4Cw RIT If you go to his E-Bay "store," there are a number of Drake items in "As New" condition. Looks like a radio-flipper to me.
--
"The Constitution does not authorize agencies to use pan-and-phone regulations as substitutes for law passed by the peoples representatives." ~ Justice Gorsech, Concurring Opinion
--
Chuck Rippel, K8HU
|
TR4-CW Service Bulletin Upload 2
Sure, let me downsize the document a bit.? It's attached.
Chuck, K8HU
"
Chuck, can you send this as an attachment? It's way too big as an inline document.
73,
Steve Wedge, W1ES/4" -- Chuck Rippel, K8HU
|
The costs of shipping supplies aren't cheap either. Bubble wrap, foam sheeting and boxes aren't cheap. I sell things occasionally and the costs of shipping have sharply increased along with everything else.?
Marty KL7AM
From: "John K5MO" <johnk5mo@...> To: "DRAKE-RADIO" < [email protected]> Sent: Wednesday, May 17, 2023 7:43:53 AM Subject: Re: [DRAKE-RADIO] NOS TR-4Cw RIT
Charge USPS/UPS counter rates, and pay PirateShip/commercial account rates. It's a good way to skim a few more bucks from the buyer. John K5MO
A flipper indeed¡crazy shipping fees¡NO TU! ? STAY SAFE AND STAY WELL!
Respectfully,
Thomas K. Lanieri, NU2W
NJ Licensed EMT; PHTLS, AMLS, PHPEC B.A.A. EMS Support ARC N.E. BioMedical Services ARC N.E. Disaster Health Services DanaFarber-Am Cancer Society ? From: [email protected] <[email protected]> On Behalf Of Chuck Rippel - K8HU and ex - NMN
Sent: Tuesday, May 16, 2023 4:42 PM
To: [email protected]
Subject: Re: [DRAKE-RADIO] NOS TR-4Cw RIT ? If you go to his E-Bay "store," there are a number of Drake items in "As New" condition. Looks like a radio-flipper to me.
--
"The Constitution does not authorize agencies to use pan-and-phone regulations as substitutes for law passed by the peoples representatives." ~ Justice Gorsech, Concurring Opinion
--
Chuck Rippel, K8HU
|
Oh please John!
Really?
Jim W7RY
On 5/17/2023 10:43 AM, John K5MO wrote:
Charge USPS/UPS counter rates, and pay
PirateShip/commercial account rates. It's a good way to skim a
few more bucks from the buyer.
John K5MO
A
flipper indeed¡crazy shipping fees¡NO TU!
?
STAY
SAFE AND STAY WELL!
Respectfully,
Thomas
K. Lanieri, NU2W
NJ
Licensed EMT; PHTLS, AMLS, PHPEC
B.A.A.
EMS Support
ARC
N.E. BioMedical Services
ARC
N.E. Disaster Health Services
DanaFarber-Am
Cancer Society
?
From: [email protected]
<[email protected]>
On Behalf Of Chuck Rippel - K8HU and ex - NMN
Sent: Tuesday, May 16, 2023 4:42 PM
To: [email protected]
Subject: Re: [DRAKE-RADIO] NOS TR-4Cw RIT
?
If
you go to his E-Bay "store," there are a number
of Drake items in "As New" condition.
Looks
like a radio-flipper to me.
--
"The Constitution
does not authorize agencies to use
pan-and-phone regulations as substitutes for
law passed by the peoples representatives."
~ Justice Gorsech,
Concurring Opinion
--
Chuck Rippel, K8HU
--
Thanks and 73, Jim W7RY
|
Jim Shorney
NU2W
Charles Ahlgren
Chuck Rippel - K8HU and ex - NMN
