Keyboard Shortcuts
ctrl + shift + ? :
Show all keyboard shortcuts
ctrl + g :
Navigate to a group
ctrl + shift + f :
Find
ctrl + / :
Quick actions
esc to dismiss
Likes
- Ham-Amplifiers
- Messages
Search
|
Re: Series DC Blocking cap.
A total of .01 is more than enough, maybe a blown .02 was already removed in the past
toggle quoted message
Show quoted text
Carl ----- Original Message -----
From: kr9u@... [ham_amplifiers] To: ham_amplifiers@... Sent: Wednesday, June 26, 2019 10:09 PM Subject: [ham_amplifiers] Series DC Blocking cap. Slightly off topic, I am using an old Heathkit antenna switch that has the control voltages riding on the coax. The series DC blocking capacitor in the outside box has a piece chipped out of it. Maybe lighting, maybe power did it. It¡¯s an .02 uf 1.6 KV disk. I bought a .02uf 3 KV disk Vishay and installed it. If I run a 1500 watt carrier through it for about 15 seconds, it gets warmer than lukewarm. Warmest on 10 meters as I would expect. Would one expect the cap to be warm to hot after that amount of time? Any suggestions on what I should put in there? Curiously, the inside control box uses two of the .02 caps in parallel, not one as the outside box does. Jim ¨C KR9U --- This email has been checked for viruses by AVG. |
|
Re: International shipping of Amplifier question L4B and a NIB HF-2500 Commander
Find a local freight forewarder and get quots for ship and air. They combine multi items in one container for a lower cost.
toggle quoted message
Show quoted text
Ive shipped several amps as well as complete vintage V8 engines that way all over the world. Australia is a hot spot for engines! Carl ----- Original Message -----
From: k9uwa@... [ham_amplifiers] To: ham_amplifiers@... Sent: Wednesday, June 26, 2019 9:17 AM Subject: [ham_amplifiers] International shipping of Amplifier question L4B and a NIB HF-2500 Commander I need to ship a Drake L4B to a ham in VK6 land. The quotes I found from FedEx DHL etc are totally nuts. The buyer isn't in a hurry but somehow we have to get the shipping to something reasonable. So I thought where better to find out than from the Ham Amplifier group? So where do we get reasonable deals. One other question. I also have a brand new in the box Commander HF-2500 with a serial number on it of 0475. It has never had a plug connected to the power cord. Yes I am selling off a local SK's ham equipment for the widow. SK is Jule Franke W9TQA link to the sales AD on QRZ.com All help appreciated. Email to me k9uwa@... thanks 73 John k9uwa --- This email has been checked for viruses by AVG. |
|
Re: Econco now rebuilding Svetlana tubes !
That¡¯s useful to know, thanks. ?I have a stock of YU204s for the 4-1000 amp and 3CX3000s for that amp but could do with a spare Thomson TH376 or two if anyone knows where to source those?
toggle quoted message
Show quoted text
Dave G0OIL? On Thursday, June 27, 2019, 2:46 pm, jim.thom@... [ham_amplifiers] <ham_amplifiers@...> wrote:
|
|
Re: International shipping of Amplifier question L4B and a NIB HF-2500 Commander
Curious, how much? Bob WE6C On Thursday, June 27, 2019, 7:24:39 AM PDT, jim.thom@... [ham_amplifiers] wrote: ? ##? Drake? L4PS? ( HV supply)? ?weighs? 45 lbs. Drake L4B? RF? deck weighs? 30 lbs.? 75 lbs total weight..... not including shipping boxes.? ## You? MIGHT? be able to ship via? USPS,? using? 2 x separate boxs.?? ##? I have? 4 x L4B's.....and? ?4 x mating? L4PS? hv supplies.? ?When? new, the L4B came in one box, the L4PS in another box, and? each tube came in it's own box....? 4 x boxes in total.? ?Dunno about the? ?2 x chimneys.? ?I believe the? chimneys each had a box.?? Jim? VE7RF? ? |
|
Re: International shipping of Amplifier question L4B and a NIB HF-2500 Commander
<I need to ship a Drake L4B to a ham in VK6 land. The quotes I found from FedEx DHL etc are totally nuts.? <thanks <John k9uwa ##? Drake? L4PS? ( HV supply)? ?weighs? 45 lbs. Drake L4B? RF? deck weighs? 30 lbs.? 75 lbs total weight..... not including shipping boxes.? ## You? MIGHT? be able to ship via? USPS,? using? 2 x separate boxs.?? ##? I have? 4 x L4B's.....and? ?4 x mating? L4PS? hv supplies.? ?When? new, the L4B came in one box, the L4PS in another box, and? each tube came in it's own box....? 4 x boxes in total.? ?Dunno about the? ?2 x chimneys.? ?I believe the? chimneys each had a box.?? Jim? VE7RF? ? |
|
Econco now rebuilding Svetlana tubes !
? Econco is? now re-building Svetlana? tubes.? ? In the past, every tube rebuilder on the planet has tried,? (including econco)... and failed to? re-build? Svetlana tubes.? ? Apparently,? Econco removes the entire guts? from the? Svetlana? tubes.....and replaces em with 'econco'? guts. Only the anode remains as oem.? ? Econco is desperate for? 'duds'.? ?I suspect that Econco? knew how to rebuild? Svetlana tubes? all? along.? ?BTW,? Eimac also rebuilt tubes.... until? they bought out? Econco.?? I? don't get tube? prices at all.? ?Chinese 8877? from? Ameritron is? >? $1000.00? ? ? ?Eimac? 8877? from Ameritron is? >? $2800.00? ? ? ?Greenstone? (chinese) 3CX-3000A7? is still? $725.00? ? ? Henry? radio? switched to greenstone brand tubes.... 7 years before they stopped selling? ?hf? amps.? ?You can still? buy? ?3x3's? ?for? $725? from? henry radio for? $725.00? ?or any? other? greenstone? dealer.? Jim? ?VE7RF |
|
Re: Hsu
<IMD is ridiculous...even at 1500W. <Screen voltage is well regulated so i am thinking IMD is from tube.? 4CX1500B swap will be possible but very <expensive ...? much more better amp is around and make here with full service support. <Dont waste a buck on this. <This is my opinion.. <Guillaume VA2NA ##? Nothing wrong with the pair of? chinese? FU-728's.? ?The? OM-4000? also uses a pair? of FU-728's, and when used with an ANAN- 8000,? IMD is? -70dbc? ? for? imd? ?3-5-7-9-11-13 .... and that's at? 4+ kw pep out.? ?But that is when .....' pure signal'? is? being used.... and the? sample is? derived from the linear .? ?KA0KA has the anan 7000 /? om-4000? setup. On the waterfall display,? on ssb / essb .... it drops off over the cliff asap.? ## But? really,? if? you want to run? 4+ kw pep? out, use a real tube, like a 3CX-3000A7.?? Jim? ?VE7RF |
|
Re: Hsu
My friend VA3AQB. Alan, has one. ?He¡¯s had his share of problems wit it. ?If you email him at his call. Yahoo.ca he can tell you much about it. ?I know he had issues. ?He fixed everything himself. ?Might want to think twice about one of them.
toggle quoted message
Show quoted text
Sent from AOL Mobile Mail Get the new AOL app:
On?Wednesday, June 26, 2019,?va2na@... [ham_amplifiers]??wrote:
|
|
Series DC Blocking cap.
Slightly off topic, I am using an old Heathkit antenna switch that has the control voltages riding on the coax.? The series DC blocking capacitor in the outside box has a piece chipped out of it.? Maybe lighting, maybe power did it.? It¡¯s an .02 uf ?1.6 KV disk. ? I bought a .02uf ?3 KV disk Vishay and installed it.? If I run a 1500 watt carrier through it for
about 15 seconds, it gets warmer than lukewarm.?? Warmest on 10 meters as I would expect. ? Would one expect
the cap to be warm to hot after that amount of time??? Any suggestions on what I should put in
there??? Curiously, the inside control
box uses two of the .02 caps in parallel, not one as the? outside box does. ? Jim ¨C KR9U |
|
Re: International shipping of Amplifier question L4B and a NIB HF-2500 Commander
¿ªÔÆÌåÓýPS: I'd love the Commander but I already have one. :-)On 26/06/2019 9:17 PM, k9uwa@... [ham_amplifiers] wrote: I need to ship a Drake L4B to a ham in VK6 land. The quotes I found from FedEx DHL etc are totally nuts. The buyer isn't in a hurry but somehow we have to get the shipping to something reasonable. So I thought where better to find out than from the Ham Amplifier group? So where do we get reasonable deals. -- From sunny Binningup Family Businesses: SP Electrical. The Velvet Fox. Smart Design Electrical. Perth Interiors. |
|
Re: International shipping of Amplifier question L4B and a NIB HF-2500 Commander
¿ªÔÆÌåÓýG'day John.USPS? Pack and Send? The latter uses the same courier companies but they have big accounts, so the prices are often vastly cheaper. I don't know why it costs so much to get stuff out of North America. The same weight as a L4 amp and supply, sent from China, via DHL, etc, costs around US$80.00. I know this because I get HV transformers custom built there and they are shipped to me here in rural VK6. The VK6 ham is my good friend. He lives 9 miles from me. I suggested the L4 for him. You will not have any troubles dealing with him. He had one organised and paid for from a ham in YV but because of the political situation there, it was impounded by authorities. My mate got his money back and the last I heard, the owner is trying hard to get his amp back. 73, Alek. VK6APK On 26/06/2019 9:17 PM, k9uwa@... [ham_amplifiers] wrote: I need to ship a Drake L4B to a ham in VK6 land. The quotes I found from FedEx DHL etc are totally nuts. The buyer isn't in a hurry but somehow we have to get the shipping to something reasonable. So I thought where better to find out than from the Ham Amplifier group? So where do we get reasonable deals. -- From sunny Binningup Family Businesses: SP Electrical. The Velvet Fox. Smart Design Electrical. Perth Interiors. |
|
Re: Hsu
To be honest with you guy... stay away from it.
i Know 4 owner of LA-4000, 3 got home for major repair + modification.? The last one i dont know i never spoke with the owner but i bet is power board will fry very soon. YU Lang the owner of AMPTEC, is not listen at all...not very helpfull ...he not came back to my email as i told him all the bad design he do on this piece of junk :) The way he keep the amp running using power divider on 240 volt is getting hot very fast and blow very quick. Glitch resistor value is to low and not limit often current when flashover occur...the board trace goes in smoke each time. IMD is ridiculous...even at 1500W. Screen voltage is well regulated so i am thinking IMD is from tube.? 4CX1500B swap will be possible but very expensive ...? much more better amp is around and make here with full service support. Dont waste a buck on this. This is my opinion.. Guillaume VA2NA |
|
International shipping of Amplifier question L4B and a NIB HF-2500 Commander
I need to ship a Drake L4B to a ham in VK6 land. The quotes I found from FedEx DHL etc are totally nuts. The buyer isn't in a hurry but somehow we have to get the shipping to something reasonable. So I thought where better to find out than from the Ham Amplifier group? So where do we get reasonable deals.
One other question. I also have a brand new in the box Commander HF-2500 with a serial number on it of 0475. It has never had a plug connected to the power cord. Yes I am selling off a local SK's ham equipment for the widow. SK is Jule Franke W9TQA link to the sales AD on QRZ.com All help appreciated. Email to me k9uwa@...? thanks 73 John k9uwa |
|
Re: Hsu
¿ªÔÆÌåÓýThanks Lou.Hsu was a great contact. He helped me out on many occasions, when it came to sourcing good quality stuff from China. Not only that, I reckon he is a very decent and honest person. As I mentioned, I had a question for him the other week and the email has gone unanswered, so far. I hope everything is ok with him. Cheers, Alek. On 25/06/2019 6:55 PM, Gudguyham@... [ham_amplifiers] wrote: Hsu and his partner who sold the HF 2013 amplifier back in 2013 had broken off the partnership and his partner went on to start the Amptech company. ?Hsu was supposed to come to Dayton in 2013 to show off the HF2013 manual and auto tune amps. ?About a week before the Dayton show Hsu ?gas bypass surgery and couldn¡¯t make Dayton. ?The amps were here in the US waiting for him. ?The manual tune was to go to a friend of mine as he had already paid for it. ?Subsequently my friend finally got the amp some months later. ?The amp had issues that I had worked on and at the time I was in contact with Hsu as he shipped me parts. ?Since that time I haven¡¯t heard from him. ?Far as I know after the split with his partner he hadn¡¯t done much with amps. ?I have to admit that he was very good at supplying parts needed to get that amp working again. ? -- From sunny Binningup Family Businesses: SP Electrical. The Velvet Fox. Smart Design Electrical. Perth Interiors. |
|
Re: Hsu
VA2NA? did an? extensive IMD? write up on the Amptec? LA4000,? back? on Oct 22, 2017.? ? It's Item #15, under
'files'? on this site.? Uses? 2 x FU-728's....and? runs? 4 kw output.? ?Appears? to be a clone of a manual tune? OM-4000.? ? ?Amptec? version? is? $3.5 K.... vs $6.1 K? for the OM-4000? version. AFAIK,? amptec? is? still? HSU's? company..... but perhaps? VA2NA? can comment.? Jim? VE7RF? |
|
Re: Hsu
Hsu and his partner who sold the HF 2013 amplifier back in 2013 had broken off the partnership and his partner went on to start the Amptech company. ?Hsu was supposed to come to Dayton in 2013 to show off the HF2013 manual and auto tune amps. ?About a week before the Dayton show Hsu ?gas bypass surgery and couldn¡¯t make Dayton. ?The amps were here in the US waiting for him. ?The manual tune was to go to a friend of mine as he had already paid for it. ?Subsequently my friend finally got the amp some months later. ?The amp had issues that I had worked on and at the time I was in contact with Hsu as he shipped me parts. ?Since that time I haven¡¯t heard from him. ?Far as I know after the split with his partner he hadn¡¯t done much with amps. ?I have to admit that he was very good at supplying parts needed to get that amp working again. ?
toggle quoted message
Show quoted text
Sent from AOL Mobile Mail Get the new AOL app:
On?Tuesday, June 25, 2019,?Alek Petkovic vk6apk@... [ham_amplifiers]??wrote:
|
|
Re: W6WRT SK
I talked with Bill a few times and even bought some of the stuff he no longer had the time for.
toggle quoted message
Show quoted text
I hated to see he's gone. There are fewer and fewer of the knowledgeable left and few with any knowledge joining. I know we all had to start somewhere, but I still say my Novice exam required more theory than the present Extra exam. 73, Roger (K8RI) On 6/21/2019 1:21 AM, Randy randy@... [ham_amplifiers] wrote:
--
Roger (K8RI) |
|
Re: W6WRT SK
¿ªÔÆÌåÓýWell, shit. Another good one gone. RIP Bill. 73 Randy KZ4RV On 6/20/2019 5:31 PM,
jim.thom@... [ham_amplifiers] wrote:
?? |
|
Re: W6WRT SK
I?m sorry to see this. Did have a number of
toggle quoted message
Show quoted text
QSO?s with Bill. RIP OM de Jim SM2EKM Den 2019-06-20 kl. 23:31, skrev jim.thom@... [ham_amplifiers]: Saw this on.... 'amps'...posted? by? Rob,? K5UJ. |
to navigate to use esc to dismiss