Bill,

 Not only was I on my HB Mag-loop, I was In my Basement shack.

Flex3000 @ 5 watts and HB Mag-loop.

It was designed for 20 - 10 but the Air Variable can pull it down to 40.

According to the design program, It only has 14% efficiency on 40 also.

Sure glad you hung in there and pulled me out.

Just goes to show, When all else fails, CW will.

Joe KF0XV

--

HOORAY !!! Have Fun.

 

Well, rumors of my transformers death were exaggerated. It turns out the smoke was real, but the death had not occurred before I shut down. At the suggestion of the electronic shop owner I buy my parts from, I verified my output voltages from the power transformer.

So, today I replaced the electrolytic capacitor and found two new tubes (well new to me) replaced them on the radio. I still need to add the fuse. But it does work and I am getting close to 10 Watts. As soon as I get back up to speed with my Morse code I hope to get on the air. Thank you all for your suggestions.

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.

Well, rumors of my transformers death were exaggerated. It turns out the smoke was real, but the death had not occurred before I shut down. At the suggestion of the electronic shop owner I buy my parts from, I verified my output voltages from the power transformer.

So, today I replaced the electrolytic capacitor and found two new tubes (well new to me) replaced them on the radio. I still need to add the fuse. But it does work and I am getting close to 10 Watts. As soon as I get back up to speed with my Morse code I hope to get on the air. Thank you all for your suggestions.

Bob
KE0FAT

Pretty noisy (izzat an oxymoron?) here to night, plus significant qsb.  Making it in were:


Thanks guys, appreciate it.

-- 
72 WAØITP
I love this radio stuff.
www.wa0itp.com
wa0itp@...

An interesting net tonight.
Not too many QNIs, but Joe (KF0XV) made it in with his indoor mag loop.
Neato-Torpedo! That's my kind of radio!

Here's the list:

KK5IB       Darryl   Jonesboro, AR
WA0ITP    Terry     Ottumwa, IA
KF0XV      Joe       Kansas City, KS
KV6Z        Bill       Claremore, OK (NCS)

Thanks everybody,
73
Bill
KV6Z

This Four State net meets each Thursday morning at
8:00 AM Central on 7122 kc,the Four State 40M hangout frequency.
NCS is WAØITP (WQ5RP) and this is a Four State members only net.

Add anything to the exchange that you wish, member number, temp, rig,
ant, etc. After the net, a list of checkins will be posted on the
Four State reflector.

Hope to cu tomorrow morning at 8:00 AM Central time

--
72 WAØITP
I love this radio stuff.
www.wa0itp.com
wa0itp@wa0itp.com

The Four State QRP Comfortable nets meet each Wednesday night
beginning at 7:30 PM Central Time.

Add anything to the exchange that you wish, temp rig, ant, etc.
Checking into all, sessions is encouraged. We call it the "Clean Sweep".

7:30 Central time ... 40M CW Net on 7122, WQ5RP, ACØBQ, or KV6Z NCS
8:30 " " ... 80M CW Net on 3564, WQ5RP/WAØITP NCS.
9:00 " " ... 80M PSK Net on 3580.5, WQ5RP/NØTGR NCS

All are welcome! After the nets, a list of checkins will be
posted on the Four State reflector.

--
72 WAØITP
I love this radio stuff.
www.wa0itp.com
wa0itp@wa0itp.com

Sorry to hear about the PT in your AC-1. The problem might have been caused by a shorted 6X5 rectifier. Although I've never experienced it with any AC-1, the 6X5 has a bad reputation among the antique radio enthusiasts with shorting and taking out the power trans. (un-fused primary).

The AC-1 PT spec's are as follows:

Secondary voltages without load:

6.3 V filaments AC

300-0-300 V AC nominal. This generally varies from 290-0-290 to 325-0-325 depending upon line voltage.

Dimensions: 3" wide x 2 1/2" deep x 1 3/4" high. Stamped
with "T-141" or "T-141 H" on the end bell.

This info is from the "AC-1 FAQ" document on the AC-1 Yahoo Group.

<https://groups.yahoo.com/neo/groups/amecoac1/info>

The above voltages are from measurements. To the best of my knowledge, voltage and current spec's. for the T-141 have never been published. 40 mA on the HV secondary would be adequate and whatever the combined currents for the tube heaters is.

Best of luck with the project and

73.......Steve Smith WB6TNL
AC-1 Yahoo Group Moderator
____________________________________________________________
Old School Yearbook Pics
View Class Yearbooks Online Free. Search by School & Year. Look Now!
http://thirdpartyoffers.juno.com/TGL3141/55a6a259ace8922595e6cst02vuc

Not a problem. I blame most of my typos on my tablet's auto-correct feature .

I did a little checking and the rectifier was the tube that was arcing (little lightning like sparks between conductors internal to the tube) and the 6V6-GT never got warm. I think I will start working with the power supply tonight and see how long it takes to get to the rest of the circuit.

DARN, that was supposed to be "DON'T forget the TLC".  poor proof reading on my part before clicking send.

 

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.

-- 
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.

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....

 

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.

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

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

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

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

 

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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