|
Hey,
I was thinking of getting some parts from Tayda Electronics.? I think they have a warehouse also in the US but not sure if all the parts I need are there.
?
I think some of you have gotten those D882 transistors before and had good luck with them?
US $ 0.14 each.
?
And get some heat sinks for the D882 transistors above but also those 2SC5706 I got from kits and parts.? But not sure about the packaging of either of those.? So, not sure what heat sinks where work for either of them.
?
Some trimmer capacitors too. I think Steve buys his from there and they work for him.
?
Question - good place to get NG0 / CG0 good quality capacitors for VFO and filters right now?
?
Sure, I got a value boxes of capacitors off Amazon and I checked them and they seem to be in range of their stated tolerance.? But when it comes to a VFO and filters, I think better quality capacitors are needed.
?
73 Daniel KK4MRN
?
|
I have had constantly good luck buying parts from Tayda, but they do not have a USA warehouse. All from Thailand via Hong Kong.
Great company. Not sure how tariffs will affect them, so I just received a large order!
Regards,
--Kirk, NT0Z
My book, "Stealth Amateur Radio," is now available from
www.stealthamateur.com and on the Amazon Kindle (soon)
On Wednesday, April 9, 2025 at 12:02:36 PM CDT, Daniel KK4MRN via groups.io <daniel-kk4mrn.skipper529@...> wrote:
Hey,
I was thinking of getting some parts from Tayda Electronics.? I think they have a warehouse also in the US but not sure if all the parts I need are there.
?
I think some of you have gotten those D882 transistors before and had good luck with them?
US $ 0.14 each.
?
And get some heat sinks for the D882 transistors above but also those 2SC5706 I got from kits and parts.? But not sure about the packaging of either of those.? So, not sure what heat sinks where work for either of them.
?
Some trimmer capacitors too. I think Steve buys his from there and they work for him.
?
Question - good place to get NG0 / CG0 good quality capacitors for VFO and filters right now?
?
Sure, I got a value boxes of capacitors off Amazon and I checked them and they seem to be in range of their stated tolerance.? But when it comes to a VFO and filters, I think better quality capacitors are needed.
?
73 Daniel KK4MRN
?
|
Not according to their FAQ.
?
Where do you ship from? Depend on item availability and customer/recipient location, your order will be shipped from one of these locations, Singapore, Thailand and USA.
?
?
Unless, things have changed since they wrote the faq page.
?
On their about page, they have:
?
Where are we
Tayda Electronics corporate offices are in Bangkok, Thailand. We also have warehouse, shipping and logistics centers both in Bangkok and in Colorado, USA. Our software developers and various marketing staff are in Durango, Colorado USA. Our Electronics kit testers are in Durango and Bangkok.
?
?
So, they probably do indeed buy from Hong Kong (who does not?).?? But we are not getting their products shipped from there directly which is good.
?
73 Daniel KK4MRN
?
|
On Wed, Apr 9, 2025 at 10:02 AM, Daniel KK4MRN wrote:
Question - good place to get NG0 / CG0 good quality capacitors for VFO and filters right now?
Hi Daniel -?
?
Like many of us, I'm often on the lookout for good deals on parts, and even not so great deals if it's a much sought-after part that is hard to find. However, I'm beginning to question the wisdom of not always putting quality first with some of my previous purchases. I have a small stash of NPO's here (I do like the older big disc ceramic NPO's with stout leads and the black band across the top!) However, going forward, I plan to begin building up my stock of NPO/C0G caps from Mouser. I have confidence in the quality of their parts. For example, 270pF C0G MLCC's made by TDK are $0.21 apiece, but drop to $0.129 if you buy 10. If you're feeling ambitious and want to buy 100, the price drops even more, to $0.086 apiece - that's just $8.60 for 100 quality C0G caps. Sure, you might get NPO's cheaper somewhere else, but can you be sure of the quality? I imagine DigiKey have similar prices; it's just that Mouser is my main supplier of choice, with Tayda second, and other suppliers on a very occasional basis, as needs dictate. Dan's is fun to order from, for that "1970's ad in a magazine mail order" experience. You write or type out your order on a piece of paper, mail it to him with a check - and wait for a couple of weeks. It's just like being a kid all over again!
?
Dave
AA7EE
|
That could be, but every order of mine (10-12) has, and always has, shipped from Thailand.
I'd love the USA warehouse to be the one, but for the past 6 years, all Thailand, FWIW.
--Kirk, NT0Z
My book, "Stealth Amateur Radio," is now available from
www.stealthamateur.com and on the Amazon Kindle (soon)
On Wednesday, April 9, 2025 at 02:47:12 PM CDT, davidgeorgerichards via groups.io <djdaverichards@...> wrote:
On Wed, Apr 9, 2025 at 10:02 AM, Daniel KK4MRN wrote:
Question - good place to get NG0 / CG0 good quality capacitors for VFO and filters right now?
Hi Daniel -?
?
Like many of us, I'm often on the lookout for good deals on parts, and even not so great deals if it's a much sought-after part that is hard to find. However, I'm beginning to question the wisdom of not always putting quality first with some of my previous purchases. I have a small stash of NPO's here (I do like the older big disc ceramic NPO's with stout leads and the black band across the top!) However, going forward, I plan to begin building up my stock of NPO/C0G caps from Mouser. I have confidence in the quality of their parts. For example, 270pF C0G MLCC's made by TDK are $0.21 apiece, but drop to $0.129 if you buy 10. If you're feeling ambitious and want to buy 100, the price drops even more, to $0.086 apiece - that's just $8.60 for 100 quality C0G caps. Sure, you might get NPO's cheaper somewhere else, but can you be sure of the quality? I imagine DigiKey have similar prices; it's just that Mouser is my main supplier of choice, with Tayda second, and other suppliers on a very occasional basis, as needs dictate. Dan's is fun to order from, for that "1970's ad in a magazine mail order" experience. You write or type out your order on a piece of paper, mail it to him with a check - and wait for a couple of weeks. It's just like being a kid all over again!
?
Dave
AA7EE
|
My oders have shipped from the US, and quickly..? maybe depends on what you order.
?
Quality has been ok, only the cheap headphone jacks have been flaky.
?
I did by those RF output transistors Daniel asked about, the ones from the Frog Sounds chinese rig.
They worked GREAT in my homebrew NC-40a build.? Three watts output, no heatsink, antenna mishaps and everything!
Bought 5 I think.. still on the first one!
?
73,
Gary
WB6OGD
?
|
On Wed, Apr 9, 2025 at 01:08 PM, Kirk Kleinschmidt, NT0Z wrote:
That could be, but every order of mine (10-12) has, and always has, shipped from Thailand.
FWIW, I've ordered from them probably around 8 or 10 times over the past 10 years or so and most, if not all of the packages came from within the US. Don't quote me on this, but Colorado springs to mind. At the time, I speculated that perhaps orders were shipped in bulk to a US warehouse from Thailand, and then mailed to individual US customers from there. Interesting that your orders have all come directly from Thailand Kirk. My orders have always been fairly small. For most of them, I have been able to take advantage of the really cheap shipping. It's only when I order a few diecast enclosures that option goes away.
?
Dave
AA7EE
|
On Wed, Apr 9, 2025 at 03:08 PM, Kirk Kleinschmidt, NT0Z wrote:
I'd love the USA warehouse to be the one, but for the past 6 years, all Thailand, FWIW.
-----------------------------------------------------------------------------------------------
?
My first few Tayda orders were around 2017(ish).? They used to have 2 shipping options, slow and fast.? Depending on the order size, slow was a couple of bucks and took close to a month to get to me in the US.? Fast I think was closer to what you'd pay for UPS or FedEx and I think that took a week.? Some orders were from the US some from Thailand.? Some time ago the cheap slow option went away and now I get slow delivery at fast delivery prices.? Still a good deal for cheap stuff but I do prefer Mouser or Digikey for critical value components.
?
Also, make sure you check out their cheap tools
I am a fan of the 60? black tweezers and the $3 probe tweezers.? Neither are good enough for rocket surgery but as long as you realize that they are a great deal.
?
?
?
--
¡ì97.313?? Transmitter power standards.
(a) An amateur station must use the minimum transmitter power necessary to carry out the desired communications.
|
Now it's really a mystery!
All of my orders of discrete parts have weighed 2-3 pounds and come in amazingly well-packaged boxes.
AMAZON execs should take notes!
Regards,
Kirk, NT0Z
My book, "Stealth Amateur Radio," is now available from
www.stealthamateur.com and on the Amazon Kindle (soon)
On Wednesday, April 9, 2025 at 03:38:38 PM CDT, Doug W via groups.io <dougwilner@...> wrote:
On Wed, Apr 9, 2025 at 03:08 PM, Kirk Kleinschmidt, NT0Z wrote:
I'd love the USA warehouse to be the one, but for the past 6 years, all Thailand, FWIW.
-----------------------------------------------------------------------------------------------
?
My first few Tayda orders were around 2017(ish).? They used to have 2 shipping options, slow and fast.? Depending on the order size, slow was a couple of bucks and took close to a month to get to me in the US.? Fast I think was closer to what you'd pay for UPS or FedEx and I think that took a week.? Some orders were from the US some from Thailand.? Some time ago the cheap slow option went away and now I get slow delivery at fast delivery prices.? Still a good deal for cheap stuff but I do prefer Mouser or Digikey for critical value components.
?
Also, make sure you check out their cheap tools
I am a fan of the 60? black tweezers and the $3 probe tweezers.? Neither are good enough for rocket surgery but as long as you realize that they are a great deal.
?
?
?
--
¡ì97.313?? Transmitter power standards.
(a) An amateur station must use the minimum transmitter power necessary to carry out the desired communications.
|
On Wed, Apr 9, 2025 at 10:10 PM, Kirk Kleinschmidt, NT0Z wrote:
All of my orders of discrete parts have weighed 2-3 pounds and come in amazingly well-packaged boxes.
?
AMAZON execs should take notes!
?
?
+1! Tayda orders are indeed very well packed.
?
By contrast, I recently took delivery of an oscilloscope from Amazon. It arrived in a large box, together with a 14 pound box of cat litter, a few other small items, and virtually no packing material to separate them. All free to move around in the big box!
?
Dave
AA7EE
|
Amazon.com has gotten worse in what they do.? It is not just me.? My wife and others I know have noticed this too.
And how they handle payments as well is different than how other online retailers handle payments online.? Amazon is Terrible.
I have not shopped on Amazon.com in sometime.??
?
Dave, what oscilloscope did you get?? Hams would like to know...
?
73 Daniel KK4MRN
?
|
I'm surprised Azon hasn't dropped me as a customer, because I constantly give them feedback about their ridiculously poor packaging.
Ironically, when we order indestructible stuff like bags of bath salts or a bale of rubber bands, THESE ITEMS are properly padded and packed in boxes. But when I order something electronic and fragile, it inevitably comes loose and inside a giant "air box (or a plastic envelope)," where it's free to flop around at the mercy of whatever shipping company and "savage baggage handlers" that can throw it around.
When I bought a recent 11-inch tablet, it was flopping around loosely inside a big air box. I called Azon CS and processed an exchange without ever opening the package. It took FOUR such sequential returns -- with plenty of feedback from me and plenty of commiserating from my overseas CS reps -- before the final tablet was sent properly. I also called the tablet manufacturer to let them know how poorly Azon was treating their customers and their product.
I know life as an Azon packager is probably a living hell...and I HATE to be THAT GUY (and my long-suffering YL hates it even more!), but companies will never change behavior unless they feel the financial pain of doing things badly.
A recent purchase of a 10-MHz OCXO for my home-brew GPSDO was the same, but that took only three circuits...
NEWEGG, a large PC parts retailer had a similar "bad period" of shipping hard drives with improper protection. It straightened itself out after a concerted "bad PR" effort from purchasers and online communities.
In my admittedly limited experience, the companies I deal with that always have perfect shipping hygiene are Tayda and Digikey.
Regards,
Kirk, NT0Z
My book, "Stealth Amateur Radio," is now available from
www.stealthamateur.com and on the Amazon Kindle (soon)
On Thursday, April 10, 2025 at 01:55:16 PM CDT, Daniel KK4MRN via groups.io <daniel-kk4mrn.skipper529@...> wrote:
Amazon.com has gotten worse in what they do.? It is not just me.? My wife and others I know have noticed this too.
And how they handle payments as well is different than how other online retailers handle payments online.? Amazon is Terrible.
I have not shopped on Amazon.com in sometime.??
?
Dave, what oscilloscope did you get?? Hams would like to know...
?
73 Daniel KK4MRN
?
|
On Thu, Apr 10, 2025 at 11:55 AM, Daniel KK4MRN wrote:
Dave, what oscilloscope did you get?? Hams would like to know...
My needs are simple Daniel, so I got a Hantek DSO5202P dual channel 200MHz 'scope. Comes with 2 probes, and all for just $299. I was happy with it, except for one thing. When using the Autoset feature, it always defaults to DC coupling, regardless of whether there is a DC component to the signal or not. I don't know about other brands, but Siglent 'scopes also default to DC coupling. The difference is that it is possible to customize the settings so that they prioritize AC coupling. You can't do that with the Hantek, and that's an issue for me. As a result, I returned it this morning. Not sure when, or even if, I will get another 'scope. I'm going to take a bit more time to think about this. If I do decide to get another one, the Siglent SDS1202X-E is only $80 more, and would be a strong contender.
?
On Thu, Apr 10, 2025 at 12:29 PM, Kirk Kleinschmidt, NT0Z wrote:
In my admittedly limited experience, the companies I deal with that always have perfect shipping hygiene are Tayda and Digikey.
I have only ordered from DigiKey once or twice, and they were very small orders, so I can't really comment on them. I have ordered quite a lot from Mouser over the years though, and have noticed something. Recently, they have begun absolutely drowning their parts in packing materials. It is almost comic how much bubble wrap they use. They seem to have become particularly concerned with protecting their parts during transit recently, and have tackled the issue by overpacking. In the famous SNL sketch, Christopher Walken kept saying' "More cowbell! More cowbell!" I think there might be a foreman walking around the Mouser shipping and receiving department, calling out, "More bubble wrap! More bubble wrap!" My most recent order consisted, among other things, of perhaps a dozen or so different values of resistors, in quantities of 100 or 200 each. Each individual bag of resistors was encased in bubble wrap, as were all the other small quantities of diodes, capacitors and other small parts. All those individually bubble-wrapped bags were thrown into a large plastic bag, which was inside a large box, that was far larger than it needed to be. Both Amazon and Mouser, in my experience, are equally thoughtless in their packing. The difference is that Mouser use far too much packing material, while Amazon use almost none. I prefer Mouser's approach, though they are using packing materials as a substitute for careful thought. Perhaps that approach is the lower cost one for them.
?
Tayda have gauged it perfectly, IMO. They use the packing materials that are necessary to protect the products, and no more. Tayda's approach involves equal part technique and materials, while Mouser substitute an excess of packing materials for technique.
?
Dave
AA7EE
|
To your point: My most recent Mouser order, packages arranged on ground to illustrate.
My order came from three or four warehouses and provided enough reusable packing material for a few months of eBay shipping!
I can't imagine that it's possible to show a profit with packaging like this, as my order was for about $50 total...? :)
--Kirk, NT0Z
My book, "Stealth Amateur Radio," is now available from
www.stealthamateur.com and on the Amazon Kindle (soon)
On Thursday, April 10, 2025 at 09:44:03 PM CDT, davidgeorgerichards via groups.io <djdaverichards@...> wrote:
On Thu, Apr 10, 2025 at 11:55 AM, Daniel KK4MRN wrote:
Dave, what oscilloscope did you get?? Hams would like to know...
My needs are simple Daniel, so I got a Hantek DSO5202P dual channel 200MHz 'scope. Comes with 2 probes, and all for just $299. I was happy with it, except for one thing. When using the Autoset feature, it always defaults to DC coupling, regardless of whether there is a DC component to the signal or not. I don't know about other brands, but Siglent 'scopes also default to DC coupling. The difference is that it is possible to customize the settings so that they prioritize AC coupling. You can't do that with the Hantek, and that's an issue for me. As a result, I returned it this morning. Not sure when, or even if, I will get another 'scope. I'm going to take a bit more time to think about this. If I do decide to get another one, the Siglent SDS1202X-E is only $80 more, and would be a strong contender.
?
On Thu, Apr 10, 2025 at 12:29 PM, Kirk Kleinschmidt, NT0Z wrote:
In my admittedly limited experience, the companies I deal with that always have perfect shipping hygiene are Tayda and Digikey.
I have only ordered from DigiKey once or twice, and they were very small orders, so I can't really comment on them. I have ordered quite a lot from Mouser over the years though, and have noticed something. Recently, they have begun absolutely drowning their parts in packing materials. It is almost comic how much bubble wrap they use. They seem to have become particularly concerned with protecting their parts during transit recently, and have tackled the issue by overpacking. In the famous SNL sketch, Christopher Walken kept saying' "More cowbell! More cowbell!" I think there might be a foreman walking around the Mouser shipping and receiving department, calling out, "More bubble wrap! More bubble wrap!" My most recent order consisted, among other things, of perhaps a dozen or so different values of resistors, in quantities of 100 or 200 each. Each individual bag of resistors was encased in bubble wrap, as were all the other small quantities of diodes, capacitors and other small parts. All those individually bubble-wrapped bags were thrown into a large plastic bag, which was inside a large box, that was far larger than it needed to be. Both Amazon and Mouser, in my experience, are equally thoughtless in their packing. The difference is that Mouser use far too much packing material, while Amazon use almost none. I prefer Mouser's approach, though they are using packing materials as a substitute for careful thought. Perhaps that approach is the lower cost one for them.
?
Tayda have gauged it perfectly, IMO. They use the packing materials that are necessary to protect the products, and no more. Tayda's approach involves equal part technique and materials, while Mouser substitute an excess of packing materials for technique.
?
Dave
AA7EE
|
To me it is a service to the amateur radio and experimental builder community to provide small quantities of quality parts at reasonable prices and shipping.? I don't believe they make any profit from these kind of sales,? only good will.? I have been totally amazed that they would accept an order of 1 or 2 items I needed to complete a project.? I hope Mouser, Digi-Key and others will continue to be willing to provide it, especially when its buyer beware when getting items from ebay and other sellers who do not care.? Sill would be very nice if they could consolidate orders like this into a single box with minimal packing materials. robert kg6tgi
toggle quoted message
Show quoted text
To your point: My most recent Mouser order, packages arranged on ground to illustrate.
My order came from three or four warehouses and provided enough reusable packing material for a few months of eBay shipping!
I can't imagine that it's possible to show a profit with packaging like this, as my order was for about $50 total...? :)
--Kirk, NT0Z
My book, "Stealth Amateur Radio," is now available from
www.stealthamateur.com and on the Amazon Kindle (soon)
On Thursday, April 10, 2025 at 09:44:03 PM CDT, davidgeorgerichards via groups.io <djdaverichards= [email protected]> wrote:
On Thu, Apr 10, 2025 at 11:55 AM, Daniel KK4MRN wrote:
Dave, what oscilloscope did you get?? Hams would like to know...
My needs are simple Daniel, so I got a Hantek DSO5202P dual channel 200MHz 'scope. Comes with 2 probes, and all for just $299. I was happy with it, except for one thing. When using the Autoset feature, it always defaults to DC coupling, regardless of whether there is a DC component to the signal or not. I don't know about other brands, but Siglent 'scopes also default to DC coupling. The difference is that it is possible to customize the settings so that they prioritize AC coupling. You can't do that with the Hantek, and that's an issue for me. As a result, I returned it this morning. Not sure when, or even if, I will get another 'scope. I'm going to take a bit more time to think about this. If I do decide to get another one, the Siglent SDS1202X-E is only $80 more, and would be a strong contender.
?
On Thu, Apr 10, 2025 at 12:29 PM, Kirk Kleinschmidt, NT0Z wrote:
In my admittedly limited experience, the companies I deal with that always have perfect shipping hygiene are Tayda and Digikey.
I have only ordered from DigiKey once or twice, and they were very small orders, so I can't really comment on them. I have ordered quite a lot from Mouser over the years though, and have noticed something. Recently, they have begun absolutely drowning their parts in packing materials. It is almost comic how much bubble wrap they use. They seem to have become particularly concerned with protecting their parts during transit recently, and have tackled the issue by overpacking. In the famous SNL sketch, Christopher Walken kept saying' "More cowbell! More cowbell!" I think there might be a foreman walking around the Mouser shipping and receiving department, calling out, "More bubble wrap! More bubble wrap!" My most recent order consisted, among other things, of perhaps a dozen or so different values of resistors, in quantities of 100 or 200 each. Each individual bag of resistors was encased in bubble wrap, as were all the other small quantities of diodes, capacitors and other small parts. All those individually bubble-wrapped bags were thrown into a large plastic bag, which was inside a large box, that was far larger than it needed to be. Both Amazon and Mouser, in my experience, are equally thoughtless in their packing. The difference is that Mouser use far too much packing material, while Amazon use almost none. I prefer Mouser's approach, though they are using packing materials as a substitute for careful thought. Perhaps that approach is the lower cost one for them.
?
Tayda have gauged it perfectly, IMO. They use the packing materials that are necessary to protect the products, and no more. Tayda's approach involves equal part technique and materials, while Mouser substitute an excess of packing materials for technique.
?
Dave
AA7EE
|
I'm a big fan of Tayda. I've been buying from them for several years, and they are my primary source for resistors and capacitors. Their prices are very good, their shipping is very reasonable, and I've had very good luck with virtually everything I've bought. I can think of one time that I received some mislabeled resistors, but considering I've bought hundreds of dollars in small components from them, I think that's very reasonable.
?
Tayda does carry NPO/C0G capacitors, though they often don't have the same range of values that Digikey or Mouser would. Everytime I send an order, I typically just search "C0G" and order 20-30 of whatever values they have in stock at the time. At this point, between those and the massive amount of silver micas I've hoarded, I should be good on "temperature stable" capacitors for a long time. I also buy their trimmer capacitors using the same strategy. They don't always have all the values in stock, so I just buy several of each one they have.
?
I am hopeful that they won't be affected by the tariff situation. Everything I've bought from them has come direct from Thailand I believe.
|
Hey Dave,
I am taking your advice.?? I found the TDK MLCC NG0 / CG0 capacitors at Mouser.??
I have been trying to go through various projects look at band pass and low pass filters and IF Amp filters and VFOs to see what seems to be common.
?
This is what I have so far from NorCal 40A 25th, Steve's Improved DC 40, and the Charlie Morris Simple SSB Transceiver.? I looked at the DC Receiver for the Solder Smoke and its Band Pass Filter but I guess they combine capacitor values to get their values listed on the schematic because they do not look standard.?? Other designs to look at?
?
Here is what I came up with so far:?
?
NP0/C0G Capacitor parts for BPF/LPF/IF Amp filters and VFOs
===================================================
5pf or 4.7pf
10pf
47pf or 50pf
82pf
100pf
270pf
330pf
390pf
470pf
820pf
TDK C0G (NP0) Radial Multilayer Ceramic Capacitors MLCC - Leaded
?
Sure, I have various capacitor kits.? They work ok in audio projects like my LM386 audio amp i built.? But I would not use them for a filter or VFO.
But I do not need to all these listed values found in these capacitor kits because money is limited... And I do not want to waste money buying all those capacitors I would not use.? So, I only need to buy what I consider the most common for filters and VFOs.
?
Other good values?
?
73 Daniel KK4MRN
?
On Wed, Apr 9, 2025 at 03:47 PM, Dave AA7EE wrote:
On Wed, Apr 9, 2025 at 10:02 AM, Daniel KK4MRN wrote:
Question - good place to get NG0 / CG0 good quality capacitors for VFO and filters right now?
Hi Daniel -?
?
Like many of us, I'm often on the lookout for good deals on parts, and even not so great deals if it's a much sought-after part that is hard to find. However, I'm beginning to question the wisdom of not always putting quality first with some of my previous purchases. I have a small stash of NPO's here (I do like the older big disc ceramic NPO's with stout leads and the black band across the top!) However, going forward, I plan to begin building up my stock of NPO/C0G caps from Mouser. I have confidence in the quality of their parts. For example, 270pF C0G MLCC's made by TDK are $0.21 apiece, but drop to $0.129 if you buy 10. If you're feeling ambitious and want to buy 100, the price drops even more, to $0.086 apiece - that's just $8.60 for 100 quality C0G caps. Sure, you might get NPO's cheaper somewhere else, but can you be sure of the quality? I imagine DigiKey have similar prices; it's just that Mouser is my main supplier of choice, with Tayda second, and other suppliers on a very occasional basis, as needs dictate...
?
Dave
AA7EE
|
Hello,
When I created the original topic here, it was a longer message.?? So, this is where the "Octopus" came from.? But I shortened the message because I felt it was too long.? But I forgot to adjust the title as well.
?
I still have an I-V Component Tester (Octopus) built on a solderless breadboard that William, k6whp and others encouraged me to build and learn about components like different diodes including zener diodes, silicon diodes, etc.?? This is around the time I was wanting to build Diz's (SK) wonderful keyer that is found in the 1Watter and 5Watter CW Transceiver Kits that used to be sold at kitsandparts.com?? By the way, the PCB Only and the programmed keyer chip are still available and the design is still up if you know how to search for it.??? I was successful at the little keyer with a little LM386 audio amp design (design from 2 hams on QRPTech here) - so I have a practice keyer now.? But I have since learned that I can use that keyer to hook up to any QRP transceiver to give it a keyer like the 1Watter/Organic 5Watter.
?SMT
Anyways, I wanted to move this little project "Octopus" from a solderless breadboard to a Manhattan project.?? So, many little projects to move from little breadboards that I have built...?? Even consider a "Octopus" for transistors too if there is such a thing.
?
By the way, I did not feel like paying crazy prices for J310.? So, I decided to try SMT J310 - SOT23-3.?? Much cheaper.??? Just go ahead and buy 100 count off Mouser - get 100 count of those sot23-3 to SIP DIP boards.? Get some male headers.? In the end, if you take the cost of all 3: transistors, boards, headers including shipping and divide by 3: you still come out way cheaper than trying to find J310 that you trust will work.???
?
I have a new digital microscope with a small monitor on it.??? So, I think i can solder these small SMT ICs and transistors now.??
By the way, make sure you have a 45W usb-c super fast charger like you would use for your smartphone these days to charge this.
My wife like it so much, she wanted one herself.
?
73 Daniel KK4MRN
?
?
?
|
On Sat, Apr 19, 2025 at 09:58 PM, Daniel KK4MRN wrote:
NP0/C0G Capacitor parts for BPF/LPF/IF Amp filters and VFOs
===================================================
5pf or 4.7pf
10pf
47pf or 50pf
82pf
100pf
270pf
330pf
390pf
470pf
820pf
These are all good values to have in stock Daniel. If you need some of the values in between, they can be created by putting multiple caps in parallel or series. For instance, I recently needed a 2.2pF cap for the middle section of a RX BPF - the cap that provides the coupling between the two sections. I don't have 2.2pF caps, so I put 2 x 4.7pF parts in series. It is said that in VFO's multiple caps can even be advantageous, as they allow for more efficient heat dissipation. Personally, unless there's a good reason to have multiple capacitors to make up a single value, I prefer to use one part of the correct value if at all possible.
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When I decided I was going to get more serious about building stuff, and began building up a small parts stash, like you, I made a list of the more commonly used parts. At least, I made a list of the ones I thought I would be using! I put in a fairly big order with Dan's Small Parts and Kits, and orders with other suppliers. Many of those parts came in useful but some of them, to this day, 15 years later, I still have. The moral of the story, is to buy a few things to get started, then have your future buys dictated by your needs, and build up your stash accordingly. Otherwise, you'll end up living in a small electronics parts shop, and it will have cost you a fortune! Of course, some people want that, and who am I to try to deter them :D
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I think some of the values in between the ones you mention can also be useful to have. There are quite a lot, so don't go hog-wild at first. As a medium-term goal, I think it's good to aim for small stocks of all the values in the E12 series, namely -?
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10, 12, 15, 18, 22, 27, 33, 39, 47, 56, 68, 82
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100, 120,150, etc etc, up to about 1200pF
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The E12 series, along with the others,
Some values come up more often than others. 47pF seems like a popular one. Yes, it's a lot of capacitors but one day, it will feel good to be looking at schematics, and realize you can build most anything you want from the parts you already have.
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Dave
AA7EE
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Kirk Kleinschmidt, NT0Z
