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Re: EICO Model 717 with T-4XC
Well, the Eico keyer sort of matched the NCX transceivers but it was really made to match
the Eico 753 (seven drifty three).? That design was pretty much stolen from the NCX-3 I
think.
73,
Gary
WB6OGD
On 04/06/2023 12:06 PM Gregory Beat via groups.io <w9gb@...> wrote:
[Edited Message Follows] 1968 EICO Product Catalog (PDF, 42 pages)
EICO 717 Electronic Keyer (circa 1966)
This Keyer matched the?National NCX Series Transceivers
OPERATING MANUAL
Replacing / Rebuilding Electrolytic Capacitors
FOCUS on C15 (3 section Can) and C16 Electrolytic Capacitors for Test / Replacement.
==
SIX VACUUM TUBES: 12AU7 (3); 6CB6 (1); ECH81 (2).
12AU7 :?The?12AU7?and its variants are miniature nine-pin (B9A base) medium-gain dual triode vacuum tubes.
6CB6 :? The?6CB6-A is a miniature pentode designed for use as a radio-frequency (RF) or intermediate-frequency (IF) amplifier in television receivers.?
ECH81 :?The?ECH81?is?a?miniature triode-heptode with triode acting as oscillator and mixer for AM and the heptode being the first IF amplifier on FM. The two?valve?sections share a common cathode.
Popular in Europe radios, with Phillips being a major tube manufacturer.
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TR7 digital jumper board photos please
If anyone here has either of these two boards, could you please take a photo of the backs sides and send them to me? TU & 73 John WA1ESO@...  ? ? ?? 
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I have used the concave end of a Bourns alignment screwdriver but for most that aren't frozen, regular old alligator clips usually work.
73,
Steve Wedge, W1ES/4
Time flies like an arrow.? Fruit flies like a banana.
Sent with secure email.
------- Original Message -------
On Thursday, April 6th, 2023 at 12:57 PM, victor smith <vcs3@...> wrote:
The one tool I have never come across in the various kits and job lots of alignment tools is the one needed on the R4 and others to adjust the PBT coils. They are a springy sort of spiral wound metal. I started out with a pair of straight hemostats clamped on to the flattened end of the adjusters, but that was awkward and not very precise (although the springy consistency of the adjusters makes ¡°precision¡± difficult.?
one day i was looking sadly at a broken off tip of a Spectrol alignment tool, and realized that if I carefully cut a slot in the tip, of the right width to snugly fit over the flattened end of the R4 adjusters, I might have an easier time. Indeed, that is now my Go To solution. What do other folks do?
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Measured voltage at CR1 while switching:
USB 13.47
LSB 13.41
will try the rest of your suggestion when I have a little more time.?
thanks!
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The one tool I have never come across in the various kits and job lots of alignment tools is the one needed on the R4 and others to adjust the PBT coils. They are a springy sort of spiral wound metal. I started out with a pair of straight hemostats clamped on to the flattened end of the adjusters, but that was awkward and not very precise (although the springy consistency of the adjusters makes ¡°precision¡± difficult.?
one day i was looking sadly at a broken off tip of a Spectrol alignment tool, and realized that if I carefully cut a slot in the tip, of the right width to snugly fit over the flattened end of the R4 adjusters, I might have an easier time. Indeed, that is now my Go To solution. What do other folks do?
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Re: EICO Model 717 with T-4XC
Wow thank you all so much. Feeling much more optimistic about this new acquisition! So much great information here.?
KK6BEB Sean?
On Thu, Apr 6, 2023 at 9:09 AM Doug Crompton WA3DSP < wa3dsp@...> wrote: In all my restoration observations, tubes are very resilient, especially when used within specs in places where they cannot be abused due to mistuning etc. In looking up the 717 it has two common tubes 12AU7, 6CB6, and one less common, the ECH81. The ECH81 is equivalent to the 6AJ8 or Russian 611P. All of these tubes are available if needed but I would be surprised if they were in your keyer.
--
Doug, WA3DSP
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Re: EICO Model 717 with T-4XC
In all my restoration observations, tubes are very resilient, especially when used within specs in places where they cannot be abused due to mistuning etc. In looking up the 717 it has two common tubes 12AU7, 6CB6, and one less common, the ECH81. The ECH81 is equivalent to the 6AJ8 or Russian 611P. All of these tubes are available if needed but I would be surprised if they were in your keyer.
--
Doug, WA3DSP
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Re: EICO Model 717 with T-4XC
On Thu, Apr 6, 2023 at 12:16 PM, Sean (KK6BEB) wrote:
Slightly off topic, but I just received a N.O.S. 717. Going to replace the caps for good measure and give it a try. I¡¯ve heard tubes for this are impossible to find. If anyone here happens to use one and if you¡¯ve had any luck with tubes / tubes subscriptions I¡¯d appreciate hearing about it. ?
?
Since this is a bit off topic maybe just contact me directly. I¡¯m good on QRZ.
?
Thanks!
Sean
KK6BEB
?
--
Not necessarily that off topic since you want to use it with Drake with your T-4XC.? A quick look at the tubes for your Eico keyer shows 12AU7 (x3) are very common.? ?A single 6CB6 and two 6AJ8 tubes.? All of these are obtainable.? I'm sure I have them all here.? If you find yourself in a situation, let me know.? I will try to help.? Yours may be all fine?? Enjoy.?
Peter?VE9KX
?
?
?
?
?
?
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Now selling TR7 extender 13 board kits on eBay
Jim and the group, Sure, appreciate the tip about the schematic being in the service manual. I have a retired EE friend designing a digital jumper board. Now selling TR7 extender 13 board kits on eBay Direct sales through WA1ESO@...?with Paypal 10% off the eBay price. Call if you like between 7A and 7P.? 401-624-4576
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Re: EICO Model 717 with T-4XC
1968 EICO Product Catalog (PDF, 42 pages)
EICO 717 Electronic Keyer (circa 1966)
This Keyer matched the?National NCX Series Transceivers
OPERATING MANUAL
Replacing / Rebuilding Electrolytic Capacitors
FOCUS on C15 (3 section Can) and C16 Electrolytic Capacitors for Test / Replacement.
==
SIX VACUUM TUBES: 12AU7 (3); 6CB6 (1); ECH81 (2).
12AU7 :?The?12AU7?and its variants are miniature nine-pin (B9A base) medium-gain dual triode vacuum tubes.
6CB6 :? The?6CB6-A is a miniature pentode designed for use as a radio-frequency (RF) or intermediate-frequency (IF) amplifier in television receivers.?
ECH81 :?The?ECH81?(6AJ8) is?a?miniature triode-heptode with triode acting as oscillator and mixer for AM and the heptode being the first IF amplifier on FM. The two?valve?sections share a common cathode.
Popular in Europe radios, with Phillips being a major tube manufacturer.
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GC Electronics (Rockford, IL) has been a long-time supplier of Alignment Tools & Kits for the Radio & TV Shops, Electronics & Audio Bench Technicians, and Radio Amateurs. There are a number of other manufacturers (many Eastern Asia) that have appeared since 1990. I recommend that you SHOP CAREFULLY. ?eBay, Alibaba, and other discount venues are often higher in price that manufacturer or distributor !! Anti-Static (ESD) versions preferred for Electronics Workbench. Jonard Tools (Elmsford, NY)
Alignment Tools
Aven Tools (Ann Arbor, MI)
Alignment Tools (anti-static, ESD)
Philmore-Datak (Rockford, IL)
LKG Industries, Inc. : dba Philmore/Datak/Carter Craft/Pfanstiehl
Alignment Tools on?Page 206 of their Catalog
Eclipse Tools 1PK-A001
==
Elliott Electronic Supply (Tucson, AZ) : Retailer, Surplus reseller.
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EICO Model 717 with T-4XC
Slightly off topic, but I just received a N.O.S. 717. Going to replace the caps for good measure and give it a try. I¡¯ve heard tubes for this are impossible to find. If anyone here happens to use one and if you¡¯ve had any luck with tubes / tubes subscriptions I¡¯d appreciate hearing about it. ?
Since this is a bit off topic maybe just contact me directly. I¡¯m good on QRZ.
Thanks! Sean KK6BEB
--
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Hello to the Group,
What is a good source for alignment tools for the Drake R4-C, T4X-C, TR7, R7?
I also have the Hammarlund HQ-170A-VHF, TenTec RX-340 and Omni - 6 Plus.
Thank you.
73,
Chuck
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It¡¯s the same as working with any volatile market.?
In the end, the worth is, as I¡¯ve said previously, the price that is mutually agreeable to buyer and seller.?
All markets are volatile now, due to the economic instability.?
73,
Steve Wedge, W1ES/4
Time flies like an arrow. Fruit flies like a banana.
Sent from Proton Mail for iOS
On Wed, Apr 5, 2023 at 18:03, Rick WA6III < myr748@...> wrote: On Wed, Apr 5, 2023 at 07:50 AM, Evan wrote:
"That's what they're getting on eBay"
?
Evan, K9SQG
The same "rule" applies though.....
If no one actually pays the "price", then the price comes down.? It works on eBay as well as it works at the flea-markets.
The price actually gets validated when someone wants the item bad enough and will pay any price to get it.? It works especially well on eBay since there's also the auction mentality working there.
?
--
73/Rick
WA6III
*Every post is created using Linux
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On Wed, Apr 5, 2023 at 07:50 AM, Evan wrote:
"That's what they're getting on eBay"
?
Evan, K9SQG
The same "rule" applies though..... If no one actually pays the "price", then the price comes down.? It works on eBay as well as it works at the flea-markets. The price actually gets validated when someone wants the item bad enough and will pay any price to get it.? It works especially well on eBay since there's also the auction mentality working there. ? --
73/Rick
WA6III
*Every post is created using Linux
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Re: TR4cw/rit production numbers question
toggle quoted message
Show quoted text
From: "Steve Wedge, W1ES/4 via groups.io" <w1es@...> To: "DRAKE-RADIO" < [email protected]> Sent: Wednesday, April 5, 2023 9:45:31 AM Subject: Re: [DRAKE-RADIO] TR4cw/rit production numbers question
Looking at Ron¡¯s page, mine (44138)?has to be very early production of the cW RIT, as the last cW shown is 44120 and the earliest cW RIT is 44234.? Steve Wedge, W1ES/4
Time flies like an arrow. Fruit flies like a banana.
Sent from Proton Mail for iOS On Wed, Apr 5, 2023 at 13:17, Steve Wedge, W1ES/4 via groups.io < w1es@...> wrote:
Mine is 44138. The manual that came with it appears to be a TR-4Cw with addenda for the?NB and RIT.?
73,
Steve Wedge, W1ES/4
Time flies like an arrow. Fruit flies like a banana.
Sent from Proton Mail for iOS
On Wed, Apr 5, 2023 at 10:28, William Shadid <W9MXQ@...> wrote: Paul,
Thanks for the note - I sent you a reply about the Hallicrafters items direct to your email.?
I am always amazed at how much "brighter" the receive sound is with the TR-4 than the R-4C. Maybe tied to alignment - but it sure is noticeable. (Any other comments on that point would be appreciated.)
More of us seem to have the TR-4Cw-RIT than I might have thought. Until getting this one (with the original manual) I had not realized that there was actually a dedicated manual. To be sure, some of the differences were handled with addendum pages. The surprise was the RIT version picture on the front of the manual.
73,
-Bill Shadid, W9MXQ
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Re: 2B receiver Serial numbers
Hi, Eric. Ron¡¯s database reflects only sets that have retained their final QC tags, so the dates can be used as rough estimates when trying to determine age.?
When I¡¯m shopping at hamfests, if I see any Drake equipment that I¡¯m not going to buy but have the tags, I make note of them and report them to Ron.?
There are instances with some sets (the T-4X to T-4X ?transition comes to mind) where there is overlap of serial numbers.?
73,
Steve Wedge, W1ES/4
Time flies like an arrow. Fruit flies like a banana.
?
Sent from Proton Mail for iOS
On Wed, Apr 5, 2023 at 13:10, K8CCA < echapm4@...> wrote: Good afternoon gentlemen.? The TR4C/RIT serial number thread got me to wondering when my other Drake stuff was built.? My 2B is #2005 and per Ron's serial number database? 2B production starts at #2008 being 4/1/61.? Is my receiver a preproduction version?? Is it anything special? It seems to work fine and is in nice shape.? I bought it last year off QRZ because it was pretty cheap and came with a 2AQ speaker.?
Thanks,
Eric
K8CCA
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Re: 2B receiver Serial numbers
Eric:
Your 2B is definitely an early model, but I doubt it is a pre-production model...Ron's database is based on production tags with dates & serial numbers provided by fellow Drake owners...I have provided quite a few myself from browsing eBay for Drake radios and finding photos of these tags with radios that are for sale...I also have several radios where previous owners have preserved this documentation....
So, with that said, you can pretty much say that your radio was manufactured the time frame March - April 1961, based on the info from Ron's database...Since your Drake 2B is only 3 serial numbers off of the one Ron lists, it's probably safe to say in was finished on 4/1/61 since I believe they produced these things in batches...
Just my 2 cents worth....
?
73's de Charles, KW6G (formerly - WB6IYM)
On Wed, Apr 5, 2023 at 10:10?AM K8CCA < echapm4@...> wrote: Good afternoon gentlemen.? The TR4C/RIT serial number thread got me to wondering when my other Drake stuff was built.? My 2B is #2005 and per Ron's serial number database? 2B production starts at #2008 being 4/1/61.? Is my receiver a preproduction version?? Is it anything special? It seems to work fine and is in nice shape.? I bought it last year off QRZ because it was pretty cheap and came with a 2AQ speaker.?
Thanks,
Eric
K8CCA
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Re: TR4cw/rit production numbers question
Mine is 45067 and the same manual w/addenda...
73's de Charles, KW6G (formerly - WB6IYM)
On Wed, Apr 5, 2023 at 10:17?AM Steve Wedge, W1ES/4 via <w1es= [email protected]> wrote: Mine is 44138. The manual that came with it appears to be a TR-4Cw with addenda for the?NB and RIT.?
73,
Steve Wedge, W1ES/4
Time flies like an arrow. Fruit flies like a banana.
Sent from Proton Mail for iOS
On Wed, Apr 5, 2023 at 10:28, William Shadid < W9MXQ@...> wrote: Paul,
Thanks for the note - I sent you a reply about the Hallicrafters items direct to your email.?
I am always amazed at how much "brighter" the receive sound is with the TR-4 than the R-4C. Maybe tied to alignment - but it sure is noticeable. (Any other comments on that point would be appreciated.)
More of us seem to have the TR-4Cw-RIT than I might have thought. Until getting this one (with the original manual) I had not realized that there was actually a dedicated manual. To be sure, some of the differences were handled with addendum pages. The surprise was the RIT version picture on the front of the manual.
73,
-Bill Shadid, W9MXQ
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Gary WB6OGD
Doug Crompton WA3DSP
Greg W9GB
Charles Ahlgren