Date   

Re: AMECO AC-1 issues

davemrtn
 

Sorry about the circumstances, but have fun digging into it and making all new again.  You will be all the more proud of it when done.  Take your time and do forget the TLC.

I do hope you can find all the parts you need, and they are reasonably priced.  These days, if available, tubes just seem to cost way too much, but then they aren't being manufactured in the quantities they were years ago....

On 7/15/2015 12:23 PM, weaselradio1@... [4sqrp] wrote:
 

There are a lot of good comments here. Yes, I believe I was a little too anxious to get this working to fully check out the components before applying power. Lesson learned.

Dave, your right! There is a failed component downstream of the transformer and I'm sure the transformer was an induced failure due to this problem. I noticed one of the tubes was had arcing inside the tube instead of the normal glow and the other tube didn't seem to have any power (no glow). I believe there was smoke coming from the electrolytic capacitor after I pulled power as well as the transformer. It looks like I will get to spend some quality time with the whole transmitter before I apply power again.

Bob
KE0FAT


-- 
David Martin - K5DCM
Mountain Home, Ar.
-+-+-+-+-+-+-+-+-+-+-
"It's only "work" if you'd rather be doing something else" - Dean Kamen

SCOTUS has legalized perversion, and heathens are celebrating.


Re: AMECO AC-1 issues

weaselradio1@...
 

There are a lot of good comments here. Yes, I believe I was a little too anxious to get this working to fully check out the components before applying power. Lesson learned.

Dave, your right! There is a failed component downstream of the transformer and I'm sure the transformer was an induced failure due to this problem. I noticed one of the tubes was had arcing inside the tube instead of the normal glow and the other tube didn't seem to have any power (no glow). I believe there was smoke coming from the electrolytic capacitor after I pulled power as well as the transformer. It looks like I will get to spend some quality time with the whole transmitter before I apply power again.

Bob
KE0FAT


Re: AMECO AC-1 issues

John Lonigro
 

And I would put a fuse somewhere in the circuit, probably a slo-blow due to the high inductance of the transformer.  You might consider putting one in the secondary circuit as well.  Fuses are cheap.

72,

John AA0VE

On 07/15/2015 10:40 AM, Don Wilhelm w3fpr@... [4sqrp] wrote:
 

With a transformer that old, it is quite possible that it did sacrifice itself, but it is difficult to say.
I would do a recap job on that AC-1 before attempting to apply power, particularly the electrolytics since they have likely dried up - in those times, many capacitors were paper wrapped and do not age well.

73,
Don W3FPR

On 7/15/2015 10:17 AM, David Martin davemrtn@... [4sqrp] wrote:
 

I am guessing the transformer did not sacrifice itself.  It is more probable it was put to death by a downstream component.

Before you replace the transformer, you should thoroughly test the rectifier and filter capacitor.  My first suspicion would be the capacitor.






Re: AMECO AC-1 issues

Don Wilhelm <w3fpr@...>
 

With a transformer that old, it is quite possible that it did sacrifice itself, but it is difficult to say.
I would do a recap job on that AC-1 before attempting to apply power, particularly the electrolytics since they have likely dried up - in those times, many capacitors were paper wrapped and do not age well.

73,
Don W3FPR

On 7/15/2015 10:17 AM, David Martin davemrtn@... [4sqrp] wrote:
 

I am guessing the transformer did not sacrifice itself.  It is more probable it was put to death by a downstream component.

Before you replace the transformer, you should thoroughly test the rectifier and filter capacitor.  My first suspicion would be the capacitor.





Re: AMECO AC-1 issues

Charlie Vest
 

There is a Yahoo group, of which I am a member, that is dedicated to the AC-1 and the cult like following of this rig.

You will find all the information that you need and more to find a replacement transformer and all manner of things you never knew about the AC-1 .

I HIGHLY suggest that you become a member.

The AC-1 was the first kit, as a Novice in 1965, that I was able to buy for around $16. That was a LOT of lawns to mow in those days:)

Loved the little rig but it got away from me and I have never been able to afford to replace it. I had upgraded my license and rig when a new Novice, "borrowed" it and it never returned.

Best 73,

Charlie, W5COV

On 7/15/2015 6:25 AM, weaselradio1@... [4sqrp] wrote:
 

A fuse would have been a smart move. I replaced the rotten original power cord, but had neglected to add a fuse . Pretty dumb for a safety engineer. I'm not certain where the circuit fault is, but the transformer sacrificed itself to protect the cheaper downstream parts.

Thanks for this information, I will start looking into obtaining the components.

Bob
KE0FAT





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Re: T1 Autotuner for sale

bobby rolph
 

Oh that's ok. I really do not need it but I have read that they are about the very best autotuner for QRP.
73
Bobby


On Wed, Jul 15, 2015 at 10:41 AM, 'Jim Sheldon' w0eb@... [4sqrp] <4sqrp@...> wrote:
 

Hi Bobby,
Glad you're having fun with the rig.  I do not know the lowest voltage but considering the circuit, I'd expect it to be no lower than about 11 volts.  The lower the voltage, the more current it will draw.  It runs just fine on a 12 volt battery though.
 
I have two guys wanting the tuner - the first one has to run it by his wife, but I suspect he'll grab it and the second one is waiting in the wings just in case he doesn't take it.
 
You're #3  - LOL.
 
Jim
 
------ Original Message ------
From: "Bobby Rolph rolph981@... [4sqrp]" <4sqrp@...>
To: "4sqrp@..." <4sqrp@...>; "Jim Sheldon" <w0eb@...>
Sent: 7/15/2015 9:37:36 AM
Subject: Re: [4sqrp] T1 Autotuner for sale
 


I really like the QRP rig Jim! Just got threw with another goog QSO. Have you sold your tuner yet? Also Jim do you know what is about the lowest voltage that the rig will work on?

Bobby
kb4qnr


On Tue, Jul 14, 2015 at 8:21 PM, 'Jim Sheldon' w0eb@... [4sqrp] <4sqrp@...> wrote:
 

This is still available - I figured to give the 4SQRP group first crack at it before posting it elsewhere.
 
Jim - W0EB
 
 
 
_________________________________________________________________________
 
I have an Elecraft T1, QRP auto tuner,  that I'd like to see get a good home.  It will handle 20 watts (5 times normal QRP levels) with ease and it has latching relays to keep battery usage to a minimum. It will match a wide range of antenna configurations.  A special cable (optional) is available from Elecraft that integrates it with a Yaesu FT-817 and will operate using the FT-817's "Tune" button.
 
This one was built by me, tested with a 4SQRP SS40RX/TX and meets all Elecraft's specs.
 
Elecraft's price for the kit is $139.95 plus shipping.  I'm asking $130 for it, including shipping to anywhere in the U.S. (PayPal or USPS money order accepted).  I'd prefer not to ship it internationally due to the high cost of postage.
 
Please email me off list to w0eb@... for pix or further details and the f
irst "I'll take it" (by date/time of the email) gets right of first refusal.  
 
Jim Sheldon, W0EB
2029 East Evanston Dr.
Park City, KS 67219-1618
 
 
  
 
 






Re: T1 Autotuner for sale

Jim Sheldon
 

Hi Bobby,
Glad you're having fun with the rig.  I do not know the lowest voltage but considering the circuit, I'd expect it to be no lower than about 11 volts.  The lower the voltage, the more current it will draw.  It runs just fine on a 12 volt battery though.
 
I have two guys wanting the tuner - the first one has to run it by his wife, but I suspect he'll grab it and the second one is waiting in the wings just in case he doesn't take it.
 
You're #3  - LOL.
 
Jim
 

------ Original Message ------
From: "Bobby Rolph rolph981@... [4sqrp]" <4sqrp@...>
To: "4sqrp@..." <4sqrp@...>; "Jim Sheldon" <w0eb@...>
Sent: 7/15/2015 9:37:36 AM
Subject: Re: [4sqrp] T1 Autotuner for sale
 


I really like the QRP rig Jim! Just got threw with another goog QSO. Have you sold your tuner yet? Also Jim do you know what is about the lowest voltage that the rig will work on?

Bobby
kb4qnr


On Tue, Jul 14, 2015 at 8:21 PM, 'Jim Sheldon' w0eb@... [4sqrp] <4sqrp@...> wrote:
 

This is still available - I figured to give the 4SQRP group first crack at it before posting it elsewhere.
 
Jim - W0EB
 
 
 
_________________________________________________________________________
 
I have an Elecraft T1, QRP auto tuner,  that I'd like to see get a good home.  It will handle 20 watts (5 times normal QRP levels) with ease and it has latching relays to keep battery usage to a minimum. It will match a wide range of antenna configurations.  A special cable (optional) is available from Elecraft that integrates it with a Yaesu FT-817 and will operate using the FT-817's "Tune" button.
 
This one was built by me, tested with a 4SQRP SS40RX/TX and meets all Elecraft's specs.
 
Elecraft's price for the kit is $139.95 plus shipping.  I'm asking $130 for it, including shipping to anywhere in the U.S. (PayPal or USPS money order accepted).  I'd prefer not to ship it internationally due to the high cost of postage.
 
Please email me off list to w0eb@... for pix or further details and the f
irst "I'll take it" (by date/time of the email) gets right of first refusal.  
 
Jim Sheldon, W0EB
2029 East Evanston Dr.
Park City, KS 67219-1618
 
 
  
 
 





Re: T1 Autotuner for sale

bobby rolph
 

I really like the QRP rig Jim! Just got threw with another goog QSO. Have you sold your tuner yet? Also Jim do you know what is about the lowest voltage that the rig will work on?

Bobby
kb4qnr


On Tue, Jul 14, 2015 at 8:21 PM, 'Jim Sheldon' w0eb@... [4sqrp] <4sqrp@...> wrote:
 

This is still available - I figured to give the 4SQRP group first crack at it before posting it elsewhere.
 
Jim - W0EB
 
 
 
_________________________________________________________________________
 
I have an Elecraft T1, QRP auto tuner,  that I'd like to see get a good home.  It will handle 20 watts (5 times normal QRP levels) with ease and it has latching relays to keep battery usage to a minimum. It will match a wide range of antenna configurations.  A special cable (optional) is available from Elecraft that integrates it with a Yaesu FT-817 and will operate using the FT-817's "Tune" button.
 
This one was built by me, tested with a 4SQRP SS40RX/TX and meets all Elecraft's specs.
 
Elecraft's price for the kit is $139.95 plus shipping.  I'm asking $130 for it, including shipping to anywhere in the U.S. (PayPal or USPS money order accepted).  I'd prefer not to ship it internationally due to the high cost of postage.
 
Please email me off list to w0eb@... for pix or further details and the f
irst "I'll take it" (by date/time of the email) gets right of first refusal.  
 
Jim Sheldon, W0EB
2029 East Evanston Dr.
Park City, KS 67219-1618
 
 
  
 
 



Re: AMECO AC-1 issues

davemrtn
 

I am guessing the transformer did not sacrifice itself.  It is more probable it was put to death by a downstream component.

Before you replace the transformer, you should thoroughly test the rectifier and filter capacitor.  My first suspicion would be the capacitor.


On 7/15/2015 6:25 AM, weaselradio1@... [4sqrp] wrote:
 

A fuse would have been a smart move. I replaced the rotten original power cord, but had neglected to add a fuse . Pretty dumb for a safety engineer. I'm not certain where the circuit fault is, but the transformer sacrificed itself to protect the cheaper downstream parts.

Thanks for this information, I will start looking into obtaining the components.

Bob
KE0FAT


-- 
David Martin - K5DCM
Mountain Home, Ar.
-+-+-+-+-+-+-+-+-+-+-
"It's only "work" if you'd rather be doing something else" - Dean Kamen

SCOTUS has legalized perversion, and heathens are celebrating.


Re: AMECO AC-1 issues

weaselradio1@...
 

A fuse would have been a smart move. I replaced the rotten original power cord, but had neglected to add a fuse . Pretty dumb for a safety engineer. I'm not certain where the circuit fault is, but the transformer sacrificed itself to protect the cheaper downstream parts.

Thanks for this information, I will start looking into obtaining the components.

Bob
KE0FAT


Re: AMECO AC-1 issues

John Lonigro
 

Bob:

If you do a Google search on Ameco AC-1 schematic, you'll find a schematic someone posted.  On it, he mentions the secondary is 200-300 volts center tapped at 50-100 ma.  On a different schematic, I saw the filter capacitor is rated at 450 volts, so you know the filtered DC must be less than that, probably quite a bit less. Hope this helps.

Out of curiosity, how were you able to blow the transformer?  You'd think the fuse would have blown first.

72,

John AA0VE

On 07/14/2015 11:44 PM, weaselradio1@... [4sqrp] wrote:
 

I have an AMECO AC-1 that I bought 35 years ago and I am just now trying to see if it can be used. Unfortunately, I let the magic smoke out of the power transformer tonight. I really hate to give up on a toy, but does anyone know what the secondary windings output voltages might be and more to the point, where one of these puppies can be procured. I'm betting its toast, and I need to start looking for an alternative transmitter. Any help out there?
Bob
KE0FAT



AMECO AC-1 issues

weaselradio1@...
 

I have an AMECO AC-1 that I bought 35 years ago and I am just now trying to see if it can be used. Unfortunately, I let the magic smoke out of the power transformer tonight. I really hate to give up on a toy, but does anyone know what the secondary windings output voltages might be and more to the point, where one of these puppies can be procured. I'm betting its toast, and I need to start looking for an alternative transmitter. Any help out there?
Bob
KE0FAT


Re: Springfield Mo

Ray Cadmus
 

This link will point you to several groups in the area.

http://www.w0omd.org/p/links.html

Regards,

ray���� W0PFO

--

On 07/14/2015 10:14 PM, Tiana Hall TianaHalldds@... [4sqrp] wrote:
�


I thinking about moving to Springfield Mo. I wonder what type of Ham Radio activity is in this area? I know this group started is this area. Are there other active Ham clubs in Springfield area?

Thanks Tiana KE5ODX





Springfield Mo

tianahalldds
 

I thinking about moving to Springfield Mo. I wonder what type of Ham Radio activity is in this area? I know this group started is this area. Are there other active Ham clubs in Springfield area?

Thanks Tiana KE5ODX


T1 Autotuner for sale

Jim Sheldon
 

This is still available - I figured to give the 4SQRP group first crack at it before posting it elsewhere.
 
Jim - W0EB
 
 
 
_________________________________________________________________________
 
I have an Elecraft T1, QRP auto tuner,  that I'd like to see get a good home.  It will handle 20 watts (5 times normal QRP levels) with ease and it has latching relays to keep battery usage to a minimum. It will match a wide range of antenna configurations.  A special cable (optional) is available from Elecraft that integrates it with a Yaesu FT-817 and will operate using the FT-817's "Tune" button.
 
This one was built by me, tested with a 4SQRP SS40RX/TX and meets all Elecraft's specs.
 
Elecraft's price for the kit is $139.95 plus shipping.  I'm asking $130 for it, including shipping to anywhere in the U.S. (PayPal or USPS money order accepted).  I'd prefer not to ship it internationally due to the high cost of postage.
 
Please email me off list to w0eb@... for pix or further details and the f
irst "I'll take it" (by date/time of the email) gets right of first refusal.  
 
Jim Sheldon, W0EB
2029 East Evanston Dr.
Park City, KS 67219-1618
 
 
  
 
 


Re: Ozark Patrol

w3bbo1@...
 

I couldn't leave my Ozark Patrol on the shelf...it kept calling me!  It bothered me that when the regen control was turned fully counter-clockwise, there would be no voltage at the collector of Q1.  I started off by re-heating every connection with the iron.  Still zero volts at Q1.

Looking closer at the regen pot (R4), its tabs look like they could be better positioned on the solder tabs.  I remove C13 and unsolder the pot.  Re-aligned the tabs into proper position and re-soldered everything.  Turning the power back on to the unit I have a couple volts at Q1 with the R4 pot fully counter-clockwise.

I hook up the antenna and ground connections and...hey, I got signals! 

Thanks to all for your comments and suggestions.  Thanks to 4sqrp for making the kit available.  I don't think it will replace my K2, but should be fun to play with!

73 de Bob W3BBO  


FW: [qfox] N8SS 20M Thursday Fox Announcement

Dale Putnam
 



N1IX, Dave, and I will be the foxii for Thursday.

Antennas here are KT34XA at 100' and KT34A at 20'.

Will start out split and go to simplex as soon as the pile is manageable. If all goes well the deserving should all be in the log and I will be begging for QSOs by 0229z.

Turn your beams toward Detroit and see you in the 14050-14070 wood.

Earl
N8SS





Re: Ozark Patrol

w3bbo1@...
 

Thanks to everyone who have commented and/or made suggestions.  Still no success with the regen and I think I'll follow Curt WB8YYY advice to set it on the shelf for a few days.  This morning, I did continuity checks, even removed the toroid to count turns and check the "sense" of the winding.  I'll let it rest for a couple days, then take another shot at it.

73 de Bob W3BBO


July SSS Standings

John Lonigro
 

Enclosed are the latest standings from the SSS, which include Sunday's reports and a few soapbox comments. Bill, KV6Z is pulling away, especially since Terry was unable to join in on the fun due to having company that night. I was going to add my pitiful excuse for not participating, but it was embarrassing. Let's just say it involved two dummies, one behind the controls and another at the antenna input.

Anyway, enjoy the report and soapbox comments.

72,

John AA0VE


Re: Ozark Patrol

Bill Cromwell
 

Hi Bob,

I don't have an Ozark Patrol but I do have some regens. Does the Ozark radio have a tickler coil or a tapped coil for the feedback? If the connections or winding sense of one winding or part of one winding is 'reversed' you will have degenerative feedback instead of regenerative feedback. Your symptoms sound like exactly that.

73,

Bill KU8H

On 07/13/2015 08:11 PM, Bob Reisenweber w3bbo1@msn.com [4sqrp] wrote:

When the latest batch was announced, I immediately sent in my order and received the kit last week. Sunday, I put everything together and to my disappointment, no signals. This is the first kit that hasn't worked for me from the get-go. (Built the K2, Sierra, SST, OHR-100 and others) I've checked everything twice, both component ID and location. The headphones seem better than the speaker...lots of hiss, but no signals.

I've made three different "gimmick capacitors" and even tried using my Elecraft XG-1 signal generator to insert a signal at 7.040 to no avail.

What am I doing wrong? Any suggestions welcomed. With the regen control fully counter-clockwise, the Q1 collector (can) is at 0 Volts. Increasing the regen pot shows voltage. The more clockwise you turn the control, the more the voltage increases. Something is screwed up.

Thanks,

73 de Bob W3BBO

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