Re: 12 KW CCS ON 160-15M....USING THE 3CX-6000A7..... PART 21
12 KW CCS ON 160-15M....USING THE 3CX-6000A7..... PART 21
125 uf @ 9kv dc Capacitor Bank for the 7.5 kv B+ supply for the 160-15m 3CX-6000A7 PA. Each cap is 9.8 Amp CCS Ripple Current rated @ 120 hz. .041 ohm per cap ESR...also @ 120 hz.
Here the 20 x 2500uf @ 450 vdc caps are mounted....and will be wired in series. These are 95C rated units, made by CDE. Each cap will get a 100K @ 3 watt MOF across it. The entire assy will drop into the base of the cabinet.
https://www.youtube.com/watch?v=kMY8q7vJ3Yg
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Re: Smoker contamination removal
In addition to Oxygen Orange, the Dollar Stores in Kentucky have a spray cleaning product named "Awesome" that comes in quart spray bottles and gallon refills.
This is the best nicotine/tar remover I have ever seen. It is light yellow in color, and stinks like dirty sox, hi. BUT, spray it on and the brown nicotine/tar flows off of the item. I keep spraying until all the brown flow is gone and wash the item off with tap water then distilled or deionized water.
Oxygen Orange seems to be the same as Awesome, as well as Awesome Orange.
To think what cigarettes do to our lungs......
73 Bill N4LG
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At 11:07 AM 11/16/2024, mike repinski via groups.io wrote: I have had GREAT success using Oxygen Orange I get from the Dollar Store. Great stuff and cost $1.25 last time I purchased it. Made a SB 220 rf section look like new.
On Saturday, November 16, 2024 at 10:58:12 AM EST, Technotronic Dimensions <steve@...> wrote:
Gonna try and detox an ACOM 1500 amp previously owned by a smoker ham,
anyone ever have to remove the niccotine film before maybe with chemicals?
Contact cleaner wont take it off, alcohol on a rag seems to dissolve it, so
I may
try that with small toothbrushes to get into the tight spots.
I read someone once hung a smoker contaminated ham rigg from a wire in their
garage
and put cardboard under it, and soaked it inside and out with WD40, let it
penetrate overnight
and said it yielded good results. Not sure about that tho.
--
Steve Hearns [ KA2PTE ]
Technotronic Dimensions, VT [USA]
WWW.TECHNOTRONIC-DIMENSIONS.COM
E-Mail: <mailto:Steve@...>Steve@...
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Re: Help Identifying Peter Dahl ALS4T Custom transformer specs
From the part number AL84T (and mention of "Prime", which was a predecessor to Ameritron) in the Dahl catalog pages that were uploaded and cited here, your transformer appears to be a replacement transformer for the Ameritron Al84 (four sweep tube, HF) amplifier.
Sweep tubes in this sort of amplifier often run about 1kv on the plate (others here can almost certainly clarify/correct.)
A quick perusal of some 7289 (2C39) type 23cm PA projects seems to recommend 1200-1400VDC on the plate(s), so your transformer might yield at the low end of that range if you use the higher-voltage secondary tap (850 VAC * 1.4).
Best of luck on your project and welcome to 1296!
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Re: Smoker contamination removal
I use the dishwasher...with no soap. I just strip the radio/amp of all parts that water would damage, then run the remains through the dishwasher. Comes out like new. Pop it in the oven at 'keep warm' temp (Older ovens, that would be 150 to 200¡ã) Then use simple green for everything else.
Joe - W7RKN
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-----Original Message----- From: [email protected] [mailto: [email protected]] On Behalf Of Mike Sawyer via groups.io Subject: Re: [ham-amplifiers] Smoker contamination removal I think Howard Mills, W3HM used 3 parts Fantastic to one part ammonia. He would wash and rinse in full sunshine to dry. Also if the 'leader' of the house doesn't want your stuff in the oven......
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Re: Smoker contamination removal
I think Howard Mills, W3HM used 3 parts Fantastic to one part ammonia. He would wash and rinse in full sunshine to dry. Also if the 'leader' of the house doesn't want your stuff in the oven, you can use something along the lines of a styrofoam 'cooler' with a 60 watt bulb underneath the amp, or build one out of that 'blue styrofoam' insulation using shish-kabob spits to connect the joints. I would check the temperature with an IR or cooking thermometer so it doesn't get too hot.
Mod-U-Lator,
Mike(y)/W3SLK
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-----Original Message----- From: [email protected] [mailto: [email protected]] On Behalf Of Omni Sent: Saturday, November 16, 2024 11:35 AM To: [email protected]Subject: Re: [ham-amplifiers] Smoker contamination removal You need to use Zep 505, Fantastic, or Greased Lightning, which you can buy at Home Depot. They are all similar compositions and will turn nicotine into liquid that can be washed off. I used to work for Tektronix as a Field Engineer and every service center had a spray booth where equipment could be hosed down with Zep concentrate diluted with DI water. Once the Zep had worked its magic and was still wet, the unit was sprayed again with DI water to wash out all the crud and blown dry with an air gun. Following that, the piece was put into an environmental chamber to bake out all the moisture. You can do the same thing at home. I have lost count of how many pieces of electronic gear I have cleaned the crud out of in the bathtub. Set whatever you need to clean on a towel you don't care about so the tub does not get scratched up, squirt the cleaner liberally everywhere, let it sit for a while, then flush the crud out with a shower wand, and blow it dry. If your oven is big enough you can put the piece in there on low hear (150 degrees F or so) and bake it for a few hours. If you can't fit the piece in the oven a good hair dryer set on low or medium will do the trick, but it takes longer than the over to get things dried out and then you should need to be sure things are completely dry before you apply power. The only caveat is you should remove any parts that can't get wet before the wash cycle. Most well-made power transformers are varnished and should be OK. If you are not sure pull the transformer first. -----Original Message----- From: [email protected] < [email protected]> On Behalf Of Technotronic Dimensions Sent: Saturday, November 16, 2024 10:58 AM To: [email protected]Subject: [ham-amplifiers] Smoker contamination removal Gonna try and detox an ACOM 1500 amp previously owned by a smoker ham, anyone ever have to remove the niccotine film before maybe with chemicals? Contact cleaner wont take it off, alcohol on a rag seems to dissolve it, so I may try that with small toothbrushes to get into the tight spots. I read someone once hung a smoker contaminated ham rigg from a wire in their garage and put cardboard under it, and soaked it inside and out with WD40, let it penetrate overnight and said it yielded good results. Not sure about that tho. -- Steve Hearns [ KA2PTE ] Technotronic Dimensions, VT [USA] WWW.TECHNOTRONIC-DIMENSIONS.COM E-Mail: Steve@...
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Re: Help Identifying Peter Dahl ALS4T Custom transformer specs
Here¡¯s from the original PWD catalog: ? ? PRIME INST P/N AL84T ? CORE) A-0016/ C-CORE???????? STYLE #) 10? HIPERSIL C-CORE PR) 117/234 VAC 60 HZ 1 PH ? S1) 0-600-850 VAC @ 1.0A ICAS ? S2) 6.0 VAC @ 8A CCS ? DM) HT =? 5.750 WT =? 6.200 DT =? 5.000 MD =? 3.125 MW =? 4.000 PRICE)??? $225.00 Plus S&H; FOB El Paso, TX??? WEIGHT)?? 17? LBS ? Mod-U-Lator, Mike(y)/W3SLK ? ? ?
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From: [email protected] [mailto:[email protected]] On Behalf Of K9MK
Sent: Saturday, November 16, 2024 9:45 AM
To: [email protected]
Subject: Re: [ham-amplifiers] Help Identifying Peter Dahl ALS4T Custom transformer specs? Thanks to everyone that replied here and privately too. Next, I must apologize for a partial goose chase and get an appointment at the eye doctor! The transformer plate below clearly shows I obviously read the 8 as an "S".? ? ? And yes, the date code is stamped in the serial number space. As suggested, I plan to run this up to 10V on the bench and check the secondary. Thanks All!? ? ? ?73, Mike K9MK PS: This is a smaller form factor. IIRC about 6" on a side, more or less.??
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Re: Smoker contamination removal
You need to use Zep 505, Fantastic, or Greased Lightning, which you can buy at Home Depot. They are all similar compositions and will turn nicotine into liquid that can be washed off.
I used to work for Tektronix as a Field Engineer and every service center had a spray booth where equipment could be hosed down with Zep concentrate diluted with DI water. Once the Zep had worked its magic and was still wet, the unit was sprayed again with DI water to wash out all the crud and blown dry with an air gun. Following that, the piece was put into an environmental chamber to bake out all the moisture. You can do the same thing at home. I have lost count of how many pieces of electronic gear I have cleaned the crud out of in the bathtub. Set whatever you need to clean on a towel you don't care about so the tub does not get scratched up, squirt the cleaner liberally everywhere, let it sit for a while, then flush the crud out with a shower wand, and blow it dry. If your oven is big enough you can put the piece in there on low hear (150 degrees F or so) and bake it for a few hours. If you can't fit the piece in the oven a good hair dryer set on low or medium will do the trick, but it takes longer than the over to get things dried out and then you should need to be sure things are completely dry before you apply power. The only caveat is you should remove any parts that can't get wet before the wash cycle. Most well-made power transformers are varnished and should be OK. If you are not sure pull the transformer first.
toggle quoted message
Show quoted text
-----Original Message----- From: [email protected] < [email protected]> On Behalf Of Technotronic Dimensions Sent: Saturday, November 16, 2024 10:58 AM To: [email protected]Subject: [ham-amplifiers] Smoker contamination removal Gonna try and detox an ACOM 1500 amp previously owned by a smoker ham, anyone ever have to remove the niccotine film before maybe with chemicals? Contact cleaner wont take it off, alcohol on a rag seems to dissolve it, so I may try that with small toothbrushes to get into the tight spots. I read someone once hung a smoker contaminated ham rigg from a wire in their garage and put cardboard under it, and soaked it inside and out with WD40, let it penetrate overnight and said it yielded good results. Not sure about that tho. -- Steve Hearns [ KA2PTE ] Technotronic Dimensions, VT [USA] WWW.TECHNOTRONIC-DIMENSIONS.COM E-Mail: Steve@...
|
Re: Smoker contamination removal
I have had GREAT success using Oxygen Orange I get from the Dollar Store. Great stuff and cost $1.25 last time I purchased it. Made a SB 220 rf section look like new.
Gonna try and detox an ACOM 1500 amp previously owned by a smoker ham, anyone ever have to remove the niccotine film before maybe with chemicals? Contact cleaner wont take it off, alcohol on a rag seems to dissolve it, so I may try that with small toothbrushes to get into the tight spots. I read someone once hung a smoker contaminated ham rigg from a wire in their garage and put cardboard under it, and soaked it inside and out with WD40, let it penetrate overnight and said it yielded good results. Not sure about that tho. -- Steve Hearns [ KA2PTE ] Technotronic Dimensions, VT [USA] WWW.TECHNOTRONIC-DIMENSIONS.COM E-Mail: Steve@...
|
Smoker contamination removal
Gonna try and detox an ACOM 1500 amp previously owned by a smoker ham,
anyone ever have to remove the niccotine film before maybe with chemicals?
Contact cleaner wont take it off, alcohol on a rag seems to dissolve it, so I may
try that with small toothbrushes to get into the tight spots.
I read someone once hung a smoker contaminated ham rigg from a wire in their garage
and put cardboard under it, and soaked it inside and out with WD40, let it penetrate overnight
and said it yielded good results. Not sure about that tho.
--
Steve Hearns [ KA2PTE ]
Technotronic Dimensions, VT [USA]
WWW.TECHNOTRONIC-DIMENSIONS.COM
E-Mail: Steve@...
|
Re: Help Identifying Peter Dahl ALS4T Custom transformer specs
Thanks to everyone that replied here and privately too.
Next, I must apologize for a partial goose chase and get an appointment at the eye doctor!
The transformer plate below clearly shows I obviously read the 8 as an "S".? ? ?
?
It's an AL84T
?
And yes, the date code is stamped in the serial number space.
?
As suggested, I plan to run this up to 10V on the bench and check the secondary.
?
Thanks All!? ? ? ?73, Mike K9MK
?
PS: This is a smaller form factor. IIRC about 6" on a side, more or less.??
?
?
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Re: Help Identifying Peter Dahl ALS4T Custom transformer specs
Hi Mike,
I have a transformer that was bought (by me) from Dahl some years ago, intended to power a 6x7289 ring amplifier for 1.2 GHz (750W out) built at about the same time by KB2AH (edit the info with the RF deck specified 1650V 1.8A supply capability, reflected in the requirements given to Dahl at the time for build of the HV transformer noted below below.)
The transformer has no part number (it was custom built at the time) but has the following properties (on it's label and on the screw terminals at the top of the transformer.)
Hypersil design
Primary Volts 0 - 230V - 240V
Secondary Volts 0 - 1150V - 1200V - 1250V - 1300V - 1350V
Secondary current 1.8A CCS (hence probably 2.5 KVA CCS)
(edit) Serial Number (possibly date of manufacture?) is 121597 (Dec 15 1997? not sure if this is how Dahl issued serial numbers.)
I don't have a weight or dimensions right now (I could gather either/both if it would be helpful for you).
The data received from Peter Dahl has probably been lost to the ages, but the transformer's labeling is clear as it's still new and has been in a benign environment since purchase.
(edit 2) - Found in the section '1' of the Peter Dahl catalog uploaded by VE7RF the following, which seems pretty similar (but not identical) to the transformer here:
1300/1175/1050/925V @ 2A CCS
1296 MHZ EME AMP POWER SUPPLY XFMR
CORE) A-0480/ C-CORE STYLE #) 10 HIPERSIL C-CORE
PR) 234 VAC 60 HZ 1 PH
S1) 0-925-1050-1175-1300 VAC @ 2.0A CCS
DM) HT = 8.625 WT = 8.075 DT = 7.688 MD = 3.937 MW = 5.500
PRICE) $350.00 Plus S&H FOB El Paso, TX WEIGHT) 46 LBS
As this transformer wouldn't fit the criteria of modest size as you describe yours, I doubt they are the same, and I never followed up to see if this transformer's spec became anything of a catalog product, but perhaps this info will be useful to you.
73 Dave WB0GAZ wb0gaz@...
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The following items have been added to the Files area of the [email protected] group.
By: Jim VE7RF <jim.thom@...>
Description:
Peter Dahl catalog
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Hi Alek,
I trust you are well. Have you done the step start mod ?¡°A simple but effective delay can be done with an NTC resistor. The primary winding of the transformer is only a few Ohm, so that a 1Ohm/20A NTC is sufficient to limit the large momentary switching currents of uncharged HV elco's and cold filaments.¡±
Is it effective? Other soft step start arrangements seem more complex.
I look forward to hearing from you.
Best wishes
Angus
?
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Re: Help Identifying Peter Dahl ALS4T Custom transformer specs
On Fri, Nov 15, 2024 at 08:14 PM, Dave w6de wrote:
<It not obvious how to upload this to the Files section of the forum.? I¡¯ll sent a copy to somebody who can upload this to the Files section for this forum.
If it's a PDF or similar it's easy to upload to the files section.? You cand send it to me or dino if u want, and we can upload it to the files section.? ?We are both admins of this group, but anybody can upload files, pix etc.? ?
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Re: Help Identifying Peter Dahl ALS4T Custom transformer specs
Contact Dahl / Hammond.
You could also feed 10 vac into the primary and measure the secondary,? to calculate the turns ratio.?
The SN on the Dahl label is NOT a SN, it's the date code !?
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Re: Help Identifying Peter Dahl ALS4T Custom transformer specs
I sent you a copy of a 2008 catalog I have.
It not obvious how to upload this to the Files section of the forum.?
I¡¯ll sent a copy to somebody who can upload this to the Files section for this forum.
?
73,
Dave, w6de
?
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From: [email protected] <[email protected]>
On Behalf Of K9MK via groups.io
Sent: 15 November, 2024 02:52
To: [email protected]
Subject: [ham-amplifiers] Help Identifying Peter Dahl ALS4T Custom transformer specs
?
? ? I bought a Peter Dahl transformer for use in a 1296 MHz tube amp using 2C39/7289's.? The P/N on the transformer is ALS4T and the serial number is 06/14/01.? Albeit a custom transformer (as I believe most were), I recall this being in
his catalog.? However, the ones that I can find (mid 2000's from Harbaugh) do not have it.? Might someone in the group have something earlier than this that might have it in the price description pages?? Modest in size, it is a hypersil design with a 110/220v
primary, 6.3v filament, and a HV with C.T.? I'm trying to figure out the HV secondary ratings.? Peter Dahl P/N ALS4T.??
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Help Identifying Peter Dahl ALS4T Custom transformer specs
Greetings to the Group,
?
? ? I bought a Peter Dahl transformer for use in a 1296 MHz tube amp using 2C39/7289's.? The P/N on the transformer is ALS4T and the serial number is 06/14/01.? Albeit a custom transformer (as I believe most were), I recall this being in his catalog.? However, the ones that I can find (mid 2000's from Harbaugh) do not have it.? Might someone in the group have something earlier than this that might have it in the price description pages?? Modest in size, it is a hypersil design with a 110/220v primary, 6.3v filament, and a HV with C.T.? I'm trying to figure out the HV secondary ratings.? Peter Dahl P/N ALS4T.??
?
? ?Thanks in advance.
?
73, Mike K9MK
?
?
?
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Re: the WORST ham built amplifier?
On Thu, Nov 14, 2024 at 05:42 AM, Steve wrote:
<SoCal Edison must have been very curious about that high but extremely
<erratic power consumption 8-) I wonder whether he used 3-phase... If so,
<he must have been the only 3-phase customer for miles around. I believe
<the next closest such customer would have been an Indian casino about 10
<or 15 miles away.
The tube is rated for 8 kv loaded at 5 amps. Run at the max of 40 kw input =? 27 kw pep out..... = 173 amps? when run on 60 hz? single phase.? Typ, that tube is run at just 17 kw out...... =? 25 kw input =? 108 amps? when run on 60 hz single phase.? ?Average current on SSB is just 54 amps.? To do it right,? on 60 hz? single phase,? you get em to install? 400 amp service. ...or more,? or? 2 x 400 amp drop lines into the house, with 2 x 400 amp panels.? The other method with? 400 amp service is? to use a 400 amp meter base, with 2 x 200 amp lines paralleled? from the meter base output.... with each line feeding it's own 200 amp panel.? On my own 200 amp panel,? I can get 2 pole breakers? from 15 amp... up to a max of 135 amp.? I just bought a 2 pole, 100 amp breaker, since I have loads of spare slots on the panel.? ? Previously,? I had installed a 100 amp 2 x pole breaker ...to feed my 100 amp subpanel....which in turn feeds the 4 x L4B's, misc stuff in the shop, and 2 x xcvrs,? rack gear, heat etc.? ?
? ? I use the 'BQL' type breakers in my 200 amp panel.?
So no, you don't need? 3 phase power to run big amps.? 3 phase, like 208/120 is stupid expensive to install.? And you pay extra for the privilege of having it.? 3 phase does offer a lot of advantages though.? IE: the ripple is only 5.2%? on the raw DC? coming from the 6 x leg rectifier assy..... vs? 67% for a FWB? run on 60 hz single phase.? IE: on 3 phase, most of the filtering is already done for you.? ?Ripple freq on single phase is 2F, or 120 hz, if using 60 hz......... and? 6F, or? 360 hz, if using? ?3 phase? 60 hz.?
Perhaps Dino, etc, can post a few more/ better pix of that 3x10 amp...the front panel view of it is superb.?
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Re: the WORST ham built amplifier?
On 11/13/2024 8:15 AM, Jim VE7RF via groups.io wrote: It used an Eimac? 3CX-10,000A7 in GG.? I have no clue what they used
for an IPA? to drive it with.? Probably an Alpha 87 or similar. SoCal Edison must have been very curious about that high but extremely erratic power consumption 8-) I wonder whether he used 3-phase... If so, he must have been the only 3-phase customer for miles around. I believe the next closest such customer would have been an Indian casino about 10 or 15 miles away. Steve, K0XP
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Technotronic Dimensions
K9MK
Bob