Boersma has just told me that he will get the Congress Hotel
booking codes in January...
I'll alert you whe he has them...
Bob
On 11/10/2024 18:29, James Todd wrote:
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Not too unexpectedly, the HSU277 diodes did not arrive from
AliExpress. Thus, I have no update on whether my lack of UHF is
due to a bad PIN diode. ?
I was warned that I'd probably not receive my order from
AliExpress, and then I'd be stonewalled on a refund. That is
exactly what has happened. USPS, as the last-mile shipper,
reports that there's no postage on the item, which is supposedly
in Chicago, so they're not going to handle it. ?I should have
listened.?
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Hi all,
?
you could check the following page as well, if you haven't found it already...
?
?
?
73,
?
DIck
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Hi Mike and Jack,
The tap points in an 818ND, or indeed to the late models of 817ND, are pretty much in the same place as they used to be: +RxB still on that one via, the signal on either the output (as per official HupRF installation instructions) or the input (as commonly done by various people on the Internet in order to gain more panadapter bandwidth).
Unfortunately the latter is MUCH more troublesome to solder a wire to than it used to be because since Lot 262, XF1001 is a surface-mount four-pole filter DSF753SBF rather than the through-hole MF68 from the earlier models. This means very, very little space to solder the wire to on the one hand and a considerable risk of creating a short between the input-or-output pad and the body of the filter. Personally, after much deliberation I decided that adding a panadapter to my 817 was not worth the risk of bricking it.
If you feel brave, have got a steady hand and have sourced some very fine wire, position your transceiver so that the PLL-unit shield is closer to you and the writing on XF1001 is the right way up. In that orientation, the input pad is bottom left and the output one is top right. The other two corner pads are connected to ground and can be identified quite easily because they both have short tracks leading from them to vias.
Good luck! You will need it.
Source: Yaesu FT-817/ND/-818ND Technical Supplement, available from various places on the Web.
--
Marek M0JUR
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Re: Internal battery FT-817ND
On Thu, Oct 10, 2024 at 10:27 PM, Joseph Wonoski wrote:
If you have a fully adjustable power supply for voltage and current limiting, all of that can be lumped together as a single overall limit to suit the entire setup observing the specs of all elements. It's from that perspective that I commented.
Yep, and fully understood ;-)
?
My so called bench PSU failed a few years back, not got around to replacing it,
but I used to use that for charging my 7ah gell cell.
?
(Will one day build my own when I get time).
?
In the meantime I just insert a 22 Ohm wirewound resistor in series with a bog
standard 13.8v PSU and that does the trick.
?
?
73 de Andy
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That is a helpful analysis, especially if you have the schematic at hand. My practice is to print the schematic, then trace the various signal paths on it with different color highlighters. ?After some of that, it becomes easier to see the paths. If the band-specific PIN diodes are open, you have receive but not transmit. ?My diode measures open, so it¡¯s going to get replaced if I ever get one.?
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Useful page on the rig here with regard to this diode -
?
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73 de Andy
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I think you¡¯ll get them, whatever ¡°them¡± is/are. I don¡¯t use Ali Express often, but they continually update my shipment, in an effort to add something that ¡°other buyers¡± get who have ordered what I ordered. The expected delivery date seems excessive even from China ¡°slow boat¡±. I¡¯m pretty sure our orders will show up before December.? Mike Davis WA1MAD
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On Oct 11, 2024, at 5:04?PM, James Todd via groups.io <toddjam@...> wrote:
? Well, I'm also not 100% confident the diodes are real. ?I'll update if I ever get them. ?
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Well, I'm also not 100% confident the diodes are real. ?I'll update if I ever get them. ?
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Still sounds scammy to me.?
Mike Davis WA1MAD
(h) 781 545-4381
(c) 617 909-5103
On 10/11/2024 4:43 PM CDT James Todd <toddjam@...> wrote:
?
?
It's not one of those phishing emails or texts. I get those almost everyday too. The ones that tell me that some package I supposedly ordered is in customs or some warehouse, and I'm supposed to click a link to get it. This is the real USPS tracking from the real USPS tracking site, and the local mail folks.?
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Let's hope the rather passive-aggressive bot I chatted with is as helpful. ?I'm supposed to hear from them in a few days. ?According to the tracking, it's been in Chicago since Sept. 27.?
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It's not one of those phishing emails or texts. I get those almost everyday too. The ones that tell me that some package I supposedly ordered is in customs or some warehouse, and I'm supposed to click a link to get it. This is the real USPS tracking from the real USPS tracking site, and the local mail folks.?
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I just ordered a battery pack from Windcamp¡¯s official store on Aliexpress. Purchased yesterday. Projected arrival is Dec 16th. I have purchased a lot of radio bits and bobs off of Ali in the past few years. The only thing that I had trouble with shipping on is a 24v battery. The seller probably shorted the postage but no way to know that. I filed a non delivered item claim with Ali (after exchanging messages with the seller a few times) Ali was prompt with their investigation and promptly refunded me. They do pretty well. I had also ordered a few other things in the past that ended up being poor quality junk. They refunded those easily too.?
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On Oct 11, 2024, at 15:37, Michael Davis via groups.io <maddmd818@...> wrote:
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Oh, OK. I get the USPS scam emails all the time. I'm waiting for an Ali Express delivery of my battery pack kit. ETA Dec 14
Mike Davis WA1MAD
(h) 781 545-4381
(c) 617 909-5103
On 10/11/2024 4:03 PM CDT James Todd <toddjam@...> wrote:
?
?
It's not eBay, but AliExpress. ??
The word I got was that it's a shipping scam. The individual vendor shorts the postage, and then expects USPS to deliver it anyway, collecting the postage due. USPS tracking says they're not accepting the package for shipment. ?I've had this happen a few times. When it's from an individual, and just a bit short, I get a note in my mailbox to come and pay. ?The Chinese packages are a different story.?
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Oh, OK. I get the USPS scam emails all the time. I'm waiting for an Ali Express delivery of my battery pack kit. ETA Dec 14
Mike Davis WA1MAD
(h) 781 545-4381
(c) 617 909-5103
On 10/11/2024 4:03 PM CDT James Todd <toddjam@...> wrote:
?
?
It's not eBay, but AliExpress. ??
The word I got was that it's a shipping scam. The individual vendor shorts the postage, and then expects USPS to deliver it anyway, collecting the postage due. USPS tracking says they're not accepting the package for shipment. ?I've had this happen a few times. When it's from an individual, and just a bit short, I get a note in my mailbox to come and pay. ?The Chinese packages are a different story.?
|
It's not eBay, but AliExpress. ??
The word I got was that it's a shipping scam. The individual vendor shorts the postage, and then expects USPS to deliver it anyway, collecting the postage due. USPS tracking says they're not accepting the package for shipment. ?I've had this happen a few times. When it's from an individual, and just a bit short, I get a note in my mailbox to come and pay. ?The Chinese packages are a different story.?
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I agree. It's just hung up on the way. I do most of my business with eBay dealers. Hardly ever a problem.
On Fri, Oct 11, 2024 at 2:06 PM, Michael Davis via groups.io <maddmd818@...> wrote: I¡¯ll bet it unexpectedly shows up. Mike Davis WA1MAD On Oct 11, 2024, at 1:30?PM, James Todd via groups.io <toddjam@...> wrote:
? Not too unexpectedly, the HSU277 diodes did not arrive from AliExpress. Thus, I have no update on whether my lack of UHF is due to a bad PIN diode. ?
I was warned that I'd probably not receive my order from AliExpress, and then I'd be stonewalled on a refund. That is exactly what has happened. USPS, as the last-mile shipper, reports that there's no postage on the item, which is supposedly in Chicago, so they're not going to handle it. ?I should have listened.?
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I¡¯ll bet it unexpectedly shows up. Mike Davis WA1MAD
toggle quoted message
Show quoted text
On Oct 11, 2024, at 1:30?PM, James Todd via groups.io <toddjam@...> wrote:
? Not too unexpectedly, the HSU277 diodes did not arrive from AliExpress. Thus, I have no update on whether my lack of UHF is due to a bad PIN diode. ?
I was warned that I'd probably not receive my order from AliExpress, and then I'd be stonewalled on a refund. That is exactly what has happened. USPS, as the last-mile shipper, reports that there's no postage on the item, which is supposedly in Chicago, so they're not going to handle it. ?I should have listened.?
|
Not too unexpectedly, the HSU277 diodes did not arrive from AliExpress. Thus, I have no update on whether my lack of UHF is due to a bad PIN diode. ?
I was warned that I'd probably not receive my order from AliExpress, and then I'd be stonewalled on a refund. That is exactly what has happened. USPS, as the last-mile shipper, reports that there's no postage on the item, which is supposedly in Chicago, so they're not going to handle it. ?I should have listened.?
|
I just found this article. http://fura.se/images/stories/teknik/ft817_final_amp_mod.pdf
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Re: Internal battery FT-817ND
If you have a fully adjustable power supply for voltage and current limiting, all of that can be lumped together as a single overall limit to suit the entire setup observing the specs of all elements. It's from that perspective that I commented. Joe?
On Thu, Oct 10, 2024 at 4:52 PM, G0FTD via groups.io <andyfoad@...> wrote: On Thu, Oct 10, 2024 at 12:15 AM, Joseph Wonoski wrote:
So you're saying that there's two kinds of current limits?
Yes and no.
?
The initial inrush current *could* be interpreted as what your charger PSU
might have to handle if you try charging a discharged pack with it and
thus the charger / psu should really be built to handle this current if
you don't want to let out any magic smoke from it.
?
This is normally higher than the SAFE charging / float current, which of course
should be limited to approc 1/10th of cell capacity.
?
So if you had a 10ah pack then you never really want to have 1 amp flowing
at any one time into it, otherwise you you'll screw the cell pack.
?
That's it ;-)
?
Andy
?
?
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Re: Internal battery FT-817ND
On Thu, Oct 10, 2024 at 12:15 AM, Joseph Wonoski wrote:
So you're saying that there's two kinds of current limits?
Yes and no.
?
The initial inrush current *could* be interpreted as what your charger PSU
might have to handle if you try charging a discharged pack with it and
thus the charger / psu should really be built to handle this current if
you don't want to let out any magic smoke from it.
?
This is normally higher than the SAFE charging / float current, which of course
should be limited to approc 1/10th of cell capacity.
?
So if you had a 10ah pack then you never really want to have 1 amp flowing
at any one time into it, otherwise you you'll screw the cell pack.
?
That's it ;-)
?
Andy
?
?
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Michael Davis
Kevin - K5KTM