401 Size Can?

Has anyone found success in finding a 401-size can? I have measured every can at our local WM and aside from the occasional 6" huge size, the largest I "can" find is the 307 size as shown. Our WM is next door to our snowbird campground and walking distance, but before I take the two hour drive to Costco I thought I would seek an extra breadcrumb locally. My next search will be Public 3 miles away.

Cheers es 72,

Davey - KU9L

Tuna RF Monitor

#514

Even though this kit still has no formal build instructions I decided to go ahead with assembly using the Schematic & parts list. The kit included all parts needed and the tuna can.

The kit has 3 L.E.D.s, but only the orange L.E.D. lit, so upon troubleshooting I suspect the silkscreen for the Red & the Blue L.E.D. may be marked backwards. Also, the board layout is slightly different than the current schematic, for layout convenience I suppose. After solving that little mystery all three L.E.D.s lit as expected.? Mostly this kit is just for fun, but I enjoyed the power measurement & dummy load section. I was able to measure the voltage at the peak & hold circuit so I could calculate the RMS voltage? (including the 0.4 VDC diode drop) & use ohm's law to determine power output of my transmitters. However, the 6 watts of dummy load will never get warm if one stays within the one watt maximum recommended power through the monitor circuit. I recorded this short video just so everyone can see how the L.E.D.s light up.? It was a fun kit to assemble & almost as much fun to troubleshoot to make sure I did not screw up the component installation. BTW, I spent 20 years fabricating test fixtures & writing software to test printed wiring boards for correct assembly that were to be installed in aerospace black boxes for aircraft & spacecraft. I do not miss SMD components, I love the old through-hole components just because that represents the hay day of electronics for me. SMD parts. Once the tiny SMD parts came, microscopes became my tool of choices, but my tired eyes didn't like it, lol.

Cheers es 72,

Davey - KU9L

Rockmite ][ Assembly Instructions/checklist

#505

I may have the manual? that was downloaded from your old site. I 'm on dialysis so 3 days a week are taken up but will get them on site files as soon as I can.

Re: Rockmite ][ Assembly Instructions/checklist

#502

To answer your question directly, no there isn't a step by step guide for the RockMite][.

?

All the documentation you need is on the QRPme website. One thing I would say is read the material thoroughly and really get your head around it. The RockMite is quite a simple project in reality, but with Rex's version, there's quite a few 'builder's options' which may leave you confused.?

Good luck, 73

Colin

Re: Rockmite ][ Assembly Instructions/checklist

#501

开云体育

No, you didn't overstep. I was making a point that EVERY document for QRPme kits is sitting somewhere on the QRPme.com website if it is in either mine or Chuck's computer. Occasionally, someone looks for a very old document that was on my old gigantic 1 page site that didn't get ported over, but anything from the last 15 years or so should be there somewhere.

The doc you are searching for I believe was generated by B. Scott Anderson, NE1RD. If you google NE1RD and the document, you will probably find it on his site.

Rex

On 2/28/2023 8:14 PM, Daniel Warren wrote:

Show quoted text

All,
Seems that I have accidently over stepped.

?

Rex? I was searching to see if there was a manual for the Rockmite ][ that was similar to the 49 page manual for the original Rockmite that had a step by step checkoff list with images of each step similar to the old heathkit radios.?

I checked QRPme.com for something similar but could not find it. So I sent a query to the group.

If this document is on QRPme.com and I missed it could you please point me in the correct direction?

If not I will figure it out.

Dan KD4VBV?

On Tue, Feb 28, 2023, 7:36 PM Rex Harper <w1rex@...> wrote:

Gangue,

Remember.... this [email protected] is an email forum/group. It is NOT my website! If you are looking for kits, instructions, schematics etc for a particular QRPme kit you really need to look on the website:

Almost all the historical documents are there...

that's

Rex? W1REX

On 2/28/2023 7:16 AM, Daniel Warren wrote:

Hello Group,

Several years ago I bought a QRPme Rockmite ][ kit to build but never got around to it.? Recently I pulled the kit out thinking to start the build but found that I do not have the assembly instructions. Being a complete novice kit builder, I was hoping that the assembly instructions were on the site, but could not find them.? I did find the original Rockmite Assembly instructions on the SmallWonders site.?
Will the original assembly instructions/checklist still apply for the Rockmite ][ or are there updated assembly instructions for the QRPme version?

Thanks in advance for any help.
Dan KD4VBV

Re: Rockmite ][ Assembly Instructions/checklist

#500

All,

Seems that I have accidently over stepped.

Rex? I was searching to see if there was a manual for the Rockmite ][ that was similar to the 49 page manual for the original Rockmite that had a step by step checkoff list with images of each step similar to the old heathkit radios.?

I checked QRPme.com for something similar but could not find it. So I sent a query to the group.

If this document is on QRPme.com and I missed it could you please point me in the correct direction?

If not I will figure it out.

Dan KD4VBV?

Show quoted text

On Tue, Feb 28, 2023, 7:36 PM Rex Harper <w1rex@...> wrote:

Gangue,

Remember.... this [email protected] is an email forum/group. It is NOT my website! If you are looking for kits, instructions, schematics etc for a particular QRPme kit you really need to look on the website:

Almost all the historical documents are there...

that's

Rex? W1REX

On 2/28/2023 7:16 AM, Daniel Warren wrote:

Hello Group,

Several years ago I bought a QRPme Rockmite ][ kit to build but never got around to it.? Recently I pulled the kit out thinking to start the build but found that I do not have the assembly instructions. Being a complete novice kit builder, I was hoping that the assembly instructions were on the site, but could not find them.? I did find the original Rockmite Assembly instructions on the SmallWonders site.?
Will the original assembly instructions/checklist still apply for the Rockmite ][ or are there updated assembly instructions for the QRPme version?

Thanks in advance for any help.
Dan KD4VBV

Re: Rockmite ][ Assembly Instructions/checklist

#499

开云体育

Gangue,

Remember.... this [email protected] is an email forum/group. It is NOT my website! If you are looking for kits, instructions, schematics etc for a particular QRPme kit you really need to look on the website:

Almost all the historical documents are there...

that's

Rex? W1REX

On 2/28/2023 7:16 AM, Daniel Warren wrote:

Show quoted text

Hello Group,

Several years ago I bought a QRPme Rockmite ][ kit to build but never got around to it.? Recently I pulled the kit out thinking to start the build but found that I do not have the assembly instructions. Being a complete novice kit builder, I was hoping that the assembly instructions were on the groups.io site, but could not find them.? I did find the original Rockmite Assembly instructions on the SmallWonders site.?
Will the original assembly instructions/checklist still apply for the Rockmite ][ or are there updated assembly instructions for the QRPme version?

Thanks in advance for any help.
Dan KD4VBV

Re: Rockmite ][ Assembly Instructions/checklist

#498

Richard,

I would be interested in a copy.

Dan KD4VBV

Re: Rockmite ][ Assembly Instructions/checklist

#497

Chuck, I have the original from w1rex if anyone is interested. And some extra stuff to like Crystal switching.

Re: Rockmite ][ Assembly Instructions/checklist

Chuck Carpenter

#496

Daniel,

The instructions are on the QRPme.com webpages for the version you have.
--
Chuck, W5USJ

Rockmite ][ Assembly Instructions/checklist

#495

Hello Group,

Several years ago I bought a QRPme Rockmite ][ kit to build but never got around to it.? Recently I pulled the kit out thinking to start the build but found that I do not have the assembly instructions. Being a complete novice kit builder, I was hoping that the assembly instructions were on the groups.io site, but could not find them.? I did find the original Rockmite Assembly instructions on the SmallWonders site.?
Will the original assembly instructions/checklist still apply for the Rockmite ][ or are there updated assembly instructions for the QRPme version?

Thanks in advance for any help.
Dan KD4VBV

Re: After Building a Two Tinned Tunas EZ Build, what next?

Daniel KK4MRN

#493

Replying to my own message.

The Oscillator Fun kit is designed for audio frequencies.

Is it possible we could have an Oscillator Fun kit that can be made for RF frequencies in the HF band as well?

And see if we can include cheap new tools that have come along that hams can use too:
- NanoVNA
- TinySA
- Arbitrary Waveform Generator (frequencies at least up to 15 MHz or 30 MHz)

At least include the ability to measure to the top of the code portion of the 40m band which is 7.125MHz in the USA.

The whole idea is about a fun kit to learn how to test and measure QRPme radio kits for fun and learn how it works too.??

Is this possible?

Has anyone built this kit?? What do you think of it?? Do you have any photos, notes, or videos of it?

73 Daniel KK4MRN

After Building a Two Tinned Tunas EZ Build, what next?

Daniel KK4MRN

#492

Hello fans of the can,
What would be a good QRPme radio kit to build next?

I built the Two Tinned Tunas EZ Build transmitter.? ? And I have a Sea Sprite+ transceiver kit ordered for the Buildathon on March 25th.

- The regular Sea Sprite transceiver kit?
- Sudden Receiver - a Direct Conversion Receiver
- Rock Mite transceiver
- Super Tin Tuna 5W transmitter
- Lil Squall transceiver?

Radios like Sudden Receiver, Super Tin Tuna transmitter, and Lil Squal transceiver have band modules and crystlas that can be swapped out for a different band.

And some possible tools or accessories:
- Texas Topper amp to bring up your QRPp transmitter/transceiver rf output power up to 5W
- Oscillator Fun (only does up to audio frequences)
- RF Probe in a test tube
- RF sensing automatic T-R Switch (really for those radios that have a separate receiver and transmitter like a TTT/Super TT and Sudden Receiver and do not have a built-in T/R switch).
- Power Distribution - but that uses RCA connectors and cannot be used for the RF amp because it requires its own power supply.
- Switched Tuner - want to maximum transfer of power and you do not want to destroy those finals.

I already have a RF Probe/Dummy Load device for testing RF output.? But a standalone RF probe can be helpful for testing within a circuit since most multimeters cannot measure AC voltage at HF frequencies.

I think it would be cool if there was a kit like the Oscillator FUN kit but can be used up to the top of HF frequencies so a person can learn how to measure with an oscilloscope to? to test radio receivers and transmitters.? Not only test the radios - but understand what is happening.? If it cannot handle up to the 10meter band, could we at least have a kit that can handle to the top of the CODE portion of the 40meter ham band?

Thanks,
Daniel KK4MRN

Re: ChatGBT

#490

Group,

Then I asked:

what about one using torroids?

and got:

A low pass filter using toroids can also be designed for the 20 meter ham band. Toroids are a type of magnetic core that can be used to create inductors, which are important components in many types of filters. The advantage of using toroids is that they can provide high inductance in a small package, making them ideal for compact filter designs.

Here is a design for a low pass filter using toroids:

Determine the cutoff frequency: As mentioned earlier, the cutoff frequency for a low pass filter for the 20 meter ham band should be set at 14.350 MHz.
Choose the filter topology: A common topology for a low pass filter using toroids is the T-filter, which consists of two inductors and a capacitor. The T-filter can provide a steep roll-off of frequencies above the cutoff frequency, resulting in better attenuation of unwanted signals.
Choose the toroid cores and wire: Toroid cores come in different materials and sizes, with different permeabilities and loss characteristics. For this design, we can use T50-2 toroids, which are commonly available and suitable for use in the 20 meter ham band. We will need two toroids, each wound with a few turns of wire.
Choose the component values: To achieve a cutoff frequency of 14.350 MHz, we can choose a capacitor value of 220 pF. The inductance values can be calculated using the formula L = (R^2 + X_c^2) / (2πf_c X_c), where L is the inductance, R is the resistance, X_c is the capacitive reactance, and f_c is the cutoff frequency. For this design, we can choose an inductance value of 7.5 ?H for each of the two inductors.
Wind the toroids: Wind each toroid with a few turns of wire, following the recommended winding direction for the toroid material. The number of turns will depend on the wire size and the toroid size, and can be calculated using online calculators or design software.
Assemble the filter: Connect one toroid to the input of the filter, and connect the other toroid and the capacitor in parallel to the output of the filter. The toroids and capacitor should be connected in a T-shape, with the capacitor connected between the two ends of the toroids.

This T-filter using toroids should provide good attenuation of signals above 14.350 MHz while allowing lower frequency signals to pass through. The filter can be enclosed in a shielded case to prevent interference from nearby signals, and can be powered using a low voltage power supply.

-------------------------

The Sea Sprite used 250 pf but that is for the CW portion of the band. Interesting result.

---John AC9UV

Show quoted text

On 02/26/2023 3:33 PM John Putnum, AC9UV <johnfputnam@...> wrote:

group,

Just asked a question of chatGBT.

What is a good design for a low power low pass filter for the 20 meter ham band

and got:

A low pass filter is a circuit that allows low frequency signals to pass through while attenuating high frequency signals. For the 20 meter ham band, which spans from 14.000 MHz to 14.350 MHz, a low pass filter can be designed to attenuate frequencies above 14.350 MHz.

Here is a simple design for a low power low pass filter for the 20 meter ham band:

Determine the cutoff frequency: The cutoff frequency is the frequency at which the filter starts to attenuate signals. For a low pass filter, the cutoff frequency is the highest frequency that the filter allows to pass through. In this case, the cutoff frequency should be set at 14.350 MHz.

Choose the filter topology: A simple topology for a low pass filter is the RC filter, which consists of a resistor and a capacitor. The cutoff frequency of an RC filter can be calculated using the formula f_c = 1 / (2πRC), where f_c is the cutoff frequency, R is the resistance, and C is the capacitance.

Choose the component values: To achieve a cutoff frequency of 14.350 MHz, we can choose a resistor value of 100 ohms and a capacitor value of 1 nF.

Assemble the filter: Connect the resistor and capacitor in series, with the input signal connected to the resistor and the output signal taken across the capacitor.

This simple RC low pass filter can be easily implemented using through-hole components on a printed circuit board (PCB). The filter can be powered using a low voltage power supply, and it should provide good attenuation of signals above 14.350 MHz while allowing lower frequency signals to pass through.

Interesting.

? ---John AC9UV

ChatGBT

#489

group,

Just asked a question of chatGBT.

What is a good design for a low power low pass filter for the 20 meter ham band

and got:

A low pass filter is a circuit that allows low frequency signals to pass through while attenuating high frequency signals. For the 20 meter ham band, which spans from 14.000 MHz to 14.350 MHz, a low pass filter can be designed to attenuate frequencies above 14.350 MHz.

Here is a simple design for a low power low pass filter for the 20 meter ham band:

Determine the cutoff frequency: The cutoff frequency is the frequency at which the filter starts to attenuate signals. For a low pass filter, the cutoff frequency is the highest frequency that the filter allows to pass through. In this case, the cutoff frequency should be set at 14.350 MHz.
Choose the filter topology: A simple topology for a low pass filter is the RC filter, which consists of a resistor and a capacitor. The cutoff frequency of an RC filter can be calculated using the formula f_c = 1 / (2πRC), where f_c is the cutoff frequency, R is the resistance, and C is the capacitance.
Choose the component values: To achieve a cutoff frequency of 14.350 MHz, we can choose a resistor value of 100 ohms and a capacitor value of 1 nF.
Assemble the filter: Connect the resistor and capacitor in series, with the input signal connected to the resistor and the output signal taken across the capacitor.

This simple RC low pass filter can be easily implemented using through-hole components on a printed circuit board (PCB). The filter can be powered using a low voltage power supply, and it should provide good attenuation of signals above 14.350 MHz while allowing lower frequency signals to pass through.

Interesting.

? ---John AC9UV

Just a thought

#488

Rex,

Saw some doomsday predictions on the international state of affairs, esp China with population and workforce.? Throw in a few wars and the shutdown of the Russian oil fields, which will take decades to recover (oil wells in the north freeze up and crack). The countries that rely on some of that oil will have some major difficulties. But what's a good doomsday presentation without a little collapse globally.? Then there is the price of oil for transport over the oceans will go up in price soon probably.

It may be that soon the semiconductors we count on will be in short supply.?

I put in an order for a small quantity of 2n2222's with TO18 cases and some of those 2n3622.? While the shipping is still reasonable. Just a thought.?

I have an RF probe from QRPGuys from about a year ago, so for comparison and to try to understand the usefulness of the little buggers. I took the practice card you sent, cut out the probe, soldered it together (I had to dip into my cache of SMD assorted caps, One of those you sent disappeared on my desktop, on the floor, or maybe an small ant took it home to show the folks).?

I did a comparison with the two with really different results. The showed the same trends but still scratching my head to try and figure out, rather than relative goodness, what to make of the results (some images attached).

Sea Sprite, 12v supply? two test points,? Antenna connection, Beginning of LPF

QRPMe RF Probe? ? ?Antenna? .43v? ?Beg LPF? .54v? ?ratio: .796

4.1m ohm resistor.? .01mf cap

QRPGuys RF Probe? Antenna? 1.17v? ?Beg LPF? 1.56v? ratio:? .75

4.7m ohm resistor. .01mf cap

using a harbor freight MM 10meg (I assume)

For QRPMe reading at antenna? ?(0.43v + 0.25)**2/50ohm = .009248 w?

For QRPGuys reading at antenna (1.17v + 0.25)**2/50ohm = 0.40328 w?

interesting comparison. More research to be done.

I have to confess the use of DB as an understandable effect unit still has me scratching my head. I guess I have to do some study, or start scratching on the other side of my head to balance the bare patches.

Looking forward to the buildathon.

? ---John AC9UV

? ? 73? ? (wonder how to express that in DB)

ballcar.jpg

QRPMe.jpg

ScopeQRPMeRFProb.jpg

Re: Ordered my March 2023 Buildathon's updated Sea Sprite+ kit with coupler, key, and Zepp - I have comments and questions

#481

I am starting building my Tuna Tunah as my 10W dummy load hasn't found too many signals across the pond. And by pond, I mean the one acre double pond at the treatment plant 100-feet to the north of me here at the RV park. Each is pretty much a little half-acre duckweed cover & a single duck with a broken wing that escaped from the gator a few months ago.?

There are 5 hams here but mostly French speaking Canadian's talking back to their home nets at night.

When we get back from the cruise in a week we will pickup where we left off, looking forward to doing taxes & buildathon stuff also.

72, Davey - KU9L

Show quoted text

On Fri, Feb 24, 2023 at 9:48 AM, David Knapp via groups.io
<renewables@...> wrote:

Rex,

We hope UPS lands their Santa sleigh successfully. A neighborhood had to be evacuated in N IL because the ice stretched out the guy wires of a commercial TV station that has fallen a couple of times already over the years, previously landing between homes without injuries or damaging them. Phew!!!

The supply chain thing is still screwed up. A LIFEPO4 battery I ordered for my portable compressor fridge/freezer combo in December just came yesterday, the Chinese are still learning that important things need to be double-boxed, just saying!

Zepp, EFHW, Vertical, etc. It's all just wire and once the kits are assembled then the real work begins consulting about troubleshooting techniques. I learned all of my troubleshooting from my grandfather who had two TVs stacked vertically. On one the sound worked and on the other the picture worked. When one or the other quit you just bang on the top or sides until it starts working again. For a brief time during a Saturday night John Wayne movie I got to see both pictures and sounds working at the same time!!! Unfortunately, his troubleshooting technique did not work for me in most of my life, LOL.

72,

Davey - KU9L

On Thursday, February 23, 2023 at 11:00:57 PM EST, Rex Harper <tunacankits@...> wrote:

On 2/23/2023 11:52 AM, John Putnum, AC9UV wrote:

Chuck,

That is why I mentioned it. You cut off 17ft for the CP and the rest is the antenna. Nice way to give you both and not need a feed line.?

? ---John AC9UV

On 02/23/2023 3:05 AM Chuck Carpenter <w5usj@...> wrote:

Rex is including a counterpoise. There are No-Tune sources who are expecting coax to be the counterpoise. Connecting direct to the V6 kit cuts out feed line.

From: [email protected] <[email protected]> On Behalf Of John Putnum, AC9UV via groups.io
Sent: Wednesday, February 22, 2023 4:18 PM
To: [email protected]
Subject: Re: [QRpmeKits] Ordered my March 2023 Buildathon's updated Sea Sprite+ kit with coupler, key, and Zepp - I have comments and questions

antenna and counterpoise

?

---John AC9UV

On 02/22/2023 3:01 PM Daniel KK4MRN via groups.io <sqldan2000@...> wrote:

Based on feedback from Chuck, the antenna for the Sea Sprite+ with built-in No-Tune antenna coupler is designed to work with an EFHW (End Fed Half Wave) antenna.? ?The antenna included with the Sea Spirte+ is an EFHW (End Fed Half Wave).? The antenna is not a Zepp.

--
Chuck, W5USJ

Gangue,

I have updated the Sea Sprite+ Buildathon kit page for proper antenna description. It was a simple case of my fingers typing faster than my brain was thinking and they got carried away and threw in a Zepp where it wasn't supposed to be....

I heard back from the pcb fab house and the pcbs are in transit but UPS won't tell me a thing about where they are. Probably somewhere out in the Midwest searching for an open airport to land in. I suspect that I will see them 1st part of next week. I have lots of parts in house but also lots of parts on order, in transit and also waiting for more $$$ from orders coming in to pay for them. It is the kitter's age old problem but especially exasperating in a situation like the live streamed Buildathon. I need to order the parts, cash in advance of course, to kit the kits but I never know how many will sign up. So I have to pick some number out of the air as to how many I think WILL sign up. So far I have 60 Builders signed up but trying to buy parts for many more. I have scrounged up the parts for the Builders already signed up from my parts bins but need to order more. Some parts have caught me by surprise. LM386-3s were in very short supply, DIZ had no FT50-43s and not enough T30-2s. I discovered some very important parts for some of my other kits were also non-existent or in critical shortage so I had to buy some bulk parts while I was placing SST+ orders. Anyway, bunches of parts are winging in from all over and hopefully by the end of next week everything will be in house in quantity and Steve & I can hold an early kitting party. I was looking to ship kits at least 2 weeks early so Canadian and DX orders might participate in the Buildathon in real time. Looks like I might be able to make or even beat that goal.

Also,there are 3 pieces to this Buildathon, Transceiver, Key & Antenna. I'm thinking about putting together & posting videos for the Key & Antenna portions so these projects could be completed early. Building the key early could be a nice beginners soldering practice exercise and there are quite a few beginners worried about their soldering skills! I will try to do the same with a video for the 3 toroids. If the toroids are wound before the big live stream happening, I think there won't be any problem with everyone completing the transceiver part in the 2 hour live stream time window.

Feel free to make any other suggestions that might help make this EXPO Buildathon the BEST one yet!

Rex? W1REX

Re: Ordered my March 2023 Buildathon's updated Sea Sprite+ kit with coupler, key, and Zepp - I have comments and questions

#471

Rex,

We hope UPS lands their Santa sleigh successfully. A neighborhood had to be evacuated in N IL because the ice stretched out the guy wires of a commercial TV station that has fallen a couple of times already over the years, previously landing between homes without injuries or damaging them. Phew!!!

The supply chain thing is still screwed up. A LIFEPO4 battery I ordered for my portable compressor fridge/freezer combo in December just came yesterday, the Chinese are still learning that important things need to be double-boxed, just saying!

Zepp, EFHW, Vertical, etc. It's all just wire and once the kits are assembled then the real work begins consulting about troubleshooting techniques. I learned all of my troubleshooting from my grandfather who had two TVs stacked vertically. On one the sound worked and on the other the picture worked. When one or the other quit you just bang on the top or sides until it starts working again. For a brief time during a Saturday night John Wayne movie I got to see both pictures and sounds working at the same time!!! Unfortunately, his troubleshooting technique did not work for me in most of my life, LOL.

72,

Davey - KU9L

On Thursday, February 23, 2023 at 11:00:57 PM EST, Rex Harper <tunacankits@...> wrote:

On 2/23/2023 11:52 AM, John Putnum, AC9UV wrote:

Chuck,

That is why I mentioned it. You cut off 17ft for the CP and the rest is the antenna. Nice way to give you both and not need a feed line.?

? ---John AC9UV

On 02/23/2023 3:05 AM Chuck Carpenter <w5usj@...> wrote:

Rex is including a counterpoise. There are No-Tune sources who are expecting coax to be the counterpoise. Connecting direct to the V6 kit cuts out feed line.

From: [email protected] <[email protected]> On Behalf Of John Putnum, AC9UV via groups.io
Sent: Wednesday, February 22, 2023 4:18 PM
To: [email protected]
Subject: Re: [QRpmeKits] Ordered my March 2023 Buildathon's updated Sea Sprite+ kit with coupler, key, and Zepp - I have comments and questions

antenna and counterpoise

?

---John AC9UV

On 02/22/2023 3:01 PM Daniel KK4MRN via groups.io <sqldan2000@...> wrote:

Based on feedback from Chuck, the antenna for the Sea Sprite+ with built-in No-Tune antenna coupler is designed to work with an EFHW (End Fed Half Wave) antenna.? ?The antenna included with the Sea Spirte+ is an EFHW (End Fed Half Wave).? The antenna is not a Zepp.

--
Chuck, W5USJ

Gangue,

I have updated the Sea Sprite+ Buildathon kit page for proper antenna description. It was a simple case of my fingers typing faster than my brain was thinking and they got carried away and threw in a Zepp where it wasn't supposed to be....

I heard back from the pcb fab house and the pcbs are in transit but UPS won't tell me a thing about where they are. Probably somewhere out in the Midwest searching for an open airport to land in. I suspect that I will see them 1st part of next week. I have lots of parts in house but also lots of parts on order, in transit and also waiting for more $$$ from orders coming in to pay for them. It is the kitter's age old problem but especially exasperating in a situation like the live streamed Buildathon. I need to order the parts, cash in advance of course, to kit the kits but I never know how many will sign up. So I have to pick some number out of the air as to how many I think WILL sign up. So far I have 60 Builders signed up but trying to buy parts for many more. I have scrounged up the parts for the Builders already signed up from my parts bins but need to order more. Some parts have caught me by surprise. LM386-3s were in very short supply, DIZ had no FT50-43s and not enough T30-2s. I discovered some very important parts for some of my other kits were also non-existent or in critical shortage so I had to buy some bulk parts while I was placing SST+ orders. Anyway, bunches of parts are winging in from all over and hopefully by the end of next week everything will be in house in quantity and Steve & I can hold an early kitting party. I was looking to ship kits at least 2 weeks early so Canadian and DX orders might participate in the Buildathon in real time. Looks like I might be able to make or even beat that goal.

Also,there are 3 pieces to this Buildathon, Transceiver, Key & Antenna. I'm thinking about putting together & posting videos for the Key & Antenna portions so these projects could be completed early. Building the key early could be a nice beginners soldering practice exercise and there are quite a few beginners worried about their soldering skills! I will try to do the same with a video for the 3 toroids. If the toroids are wound before the big live stream happening, I think there won't be any problem with everyone completing the transceiver part in the 2 hour live stream time window.

Feel free to make any other suggestions that might help make this EXPO Buildathon the BEST one yet!

Rex? W1REX

Re: Ordered my March 2023 Buildathon's updated Sea Sprite+ kit with coupler, key, and Zepp - I have comments and questions

#470

开云体育

On 2/23/2023 11:52 AM, John Putnum, AC9UV wrote:

Chuck,

That is why I mentioned it. You cut off 17ft for the CP and the rest is the antenna. Nice way to give you both and not need a feed line.?

? ---John AC9UV

On 02/23/2023 3:05 AM Chuck Carpenter <w5usj@...> wrote:

Rex is including a counterpoise. There are No-Tune sources who are expecting coax to be the counterpoise. Connecting direct to the V6 kit cuts out feed line.

From: [email protected] <[email protected]> On Behalf Of John Putnum, AC9UV via groups.io
Sent: Wednesday, February 22, 2023 4:18 PM
To: [email protected]
Subject: Re: [QRpmeKits] Ordered my March 2023 Buildathon's updated Sea Sprite+ kit with coupler, key, and Zepp - I have comments and questions

antenna and counterpoise

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---John AC9UV

On 02/22/2023 3:01 PM Daniel KK4MRN via groups.io <sqldan2000@...> wrote:

Based on feedback from Chuck, the antenna for the Sea Sprite+ with built-in No-Tune antenna coupler is designed to work with an EFHW (End Fed Half Wave) antenna.? ?The antenna included with the Sea Spirte+ is an EFHW (End Fed Half Wave).? The antenna is not a Zepp.

--
Chuck, W5USJ

Gangue,

I have updated the Sea Sprite+ Buildathon kit page for proper antenna description. It was a simple case of my fingers typing faster than my brain was thinking and they got carried away and threw in a Zepp where it wasn't supposed to be....

I heard back from the pcb fab house and the pcbs are in transit but UPS won't tell me a thing about where they are. Probably somewhere out in the Midwest searching for an open airport to land in. I suspect that I will see them 1st part of next week. I have lots of parts in house but also lots of parts on order, in transit and also waiting for more $$$ from orders coming in to pay for them. It is the kitter's age old problem but especially exasperating in a situation like the live streamed Buildathon. I need to order the parts, cash in advance of course, to kit the kits but I never know how many will sign up. So I have to pick some number out of the air as to how many I think WILL sign up. So far I have 60 Builders signed up but trying to buy parts for many more. I have scrounged up the parts for the Builders already signed up from my parts bins but need to order more. Some parts have caught me by surprise. LM386-3s were in very short supply, DIZ had no FT50-43s and not enough T30-2s. I discovered some very important parts for some of my other kits were also non-existent or in critical shortage so I had to buy some bulk parts while I was placing SST+ orders. Anyway, bunches of parts are winging in from all over and hopefully by the end of next week everything will be in house in quantity and Steve & I can hold an early kitting party. I was looking to ship kits at least 2 weeks early so Canadian and DX orders might participate in the Buildathon in real time. Looks like I might be able to make or even beat that goal.

Also,there are 3 pieces to this Buildathon, Transceiver, Key & Antenna. I'm thinking about putting together & posting videos for the Key & Antenna portions so these projects could be completed early. Building the key early could be a nice beginners soldering practice exercise and there are quite a few beginners worried about their soldering skills! I will try to do the same with a video for the 3 toroids. If the toroids are wound before the big live stream happening, I think there won't be any problem with everyone completing the transceiver part in the 2 hour live stream time window.

Feel free to make any other suggestions that might help make this EXPO Buildathon the BEST one yet!

Rex? W1REX

Re: Ordered my March 2023 Buildathon's updated Sea Sprite+ kit with coupler, key, and End Fed Half Wave - I have comments and questions

Daniel KK4MRN

#469

I edited my original subject which creates a new topic.

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I wanted to correct the type of antenna.??

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The antenna will not be a Zepp.??

The antenna will be an End Fed Half-Wave Antenna for 40 meter ham band.

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Enough wire will be provided to construct the antenna and counterpoise.

The antenna can hookup to the Sea Spirte+ directly using its built-in NO TUNE antenna coupler?

which was designed for this antenna.? No coax.

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QSO Today BUILDATHON KIT (#9) SST+ on Mar 25 2023

This is the Sea Spirte+ Kit

It also includes a straight key kit.

QSO Today Virtual Ham Expo on March 25 - 26

Presentation at the Buildathon on Saturday, March 25th, 2023 at 10:00 PDT (1800 UTC) (1:00 PM EDT)

2-hour session

Build a Simple Station and GOTA (Get On The Air!)

Speaker: Rex Harper W1REX

This is the follow up presentation on Sunday, March 26th, 2023.

This is the original message with incorrect subject.

/g/QRpmeKits/topic/ordered_my_march_2023/97026071

Topic where Chuck Carpenter points out that the antenna will be an End Fed Half Wave.? Not a Zepp.

/g/QRpmeKits/message/461

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