Items for sale

[Casey AI7nn]

I have some items I inherited for sale. Items are sold as is, I have never used these and I don't know the complete history.

I can ship most items (buyer pays shipping), the antennas are pickup only. Feel free to ask any questions or for additional pictures. I couldn't post pictures due to size limit.

• Down East Microwave Inc. 3456-144LP Transverter ($80)
  • DEMI said for $175 they will install a new board to convert to 3.4ghz, or you can swap the board yourself for $129 if I recall correctly.
• Down East Microwave Inc. Low noise amplifier model 2303 PA ($40)
• 903mhz amplifier (unknown make and model) ($100)
• TOHTSU Coaxial Relay model CX-520D, new in box ($90)
• 19 element 23cm loop yagi ($100)
• 45 element 13cm loop yagi ($120)
• 10 element 33cm yagi ($75)
• 7 element 33cm yagi Kathrein-Scala TY-900 ($200)
• NEC Traveling Wave Tube LD-550A (make offer)
• Hamtronics receiving converter 222mhz (make offer)
• Avantek amplifier model AWP-64100 (make offer)
• Avantek amplifier model AWP-42100 (make offer)
• W1GHZ PCB Boards (make offer)
  • http://www.w1ghz.org/
    
• Lots of Qualcomm parts (make offer)
  • These appear to be commercial parts that are used to create your own 23cm transverter, among other gear.
  • The San Diego Microwave Group has articles and how-to's for this, http://www.ham-radio.com/sbms/sd/

[Ed Cole]

Casey,

The DEMI 3456-144 transverter works fine at 3400 with no modification.
I built one using a Apol-A32 PLL local oscillator. Nominal 2 dBm drive
from the A32 was too low so I boosted it to about +10 dBm by modifying
the PLL board output pi attenuator.

Probably easier to just add MAR6 mmic stage (typ gain of 12 dB) in line
for this. DEMI sells the mmic boards very inexpensive (specify which
mmic you want) and pretty easy to make.

I got 40 mw output from my 3456 transverter using LO of 1085 (x3 = 3255)
to use a 145-MHz IF. This frequency has less phase noise than 1085.333
needed for 3256 getting 144-MHz as IF.

http://www.kl7uw.com/eme3400.htm

GL with your sale!

73, Ed - KL7UW

On 1/29/2023 8:53 AM, Casey AI7nn wrote:
> I have some items I inherited for sale. Items are sold as is, I have
> never used these and I don't know the complete history.
>
> I can ship most items (buyer pays shipping), the antennas are pickup
> only. Feel free to ask any questions or for additional pictures. I
> couldn't post pictures due to size limit.
>

> * Down East Microwave Inc. 3456-144LP Transverter *($80)*
> o DEMI said for $175 they will install a new board to convert to

> 3.4ghz, or you can swap the board yourself for $129 if I recall
> correctly.

> * Down East Microwave Inc. Low noise amplifier model 2303 PA *($40)*
> * 903mhz amplifier (unknown make and model) *($100)*
> * TOHTSU Coaxial Relay model CX-520D, new in box *($90)*
> * 19 element 23cm loop yagi *($100)*
> * 45 element 13cm loop yagi*($120)*
> * 10 element 33cm yagi*($75)*
> * 7 element 33cm yagi Kathrein-Scala TY-900 *($200)*
> * NEC Traveling Wave Tube LD-550A *(make offer)*
> * Hamtronics receiving converter 222mhz *(make offer)*
> * Avantek amplifier model AWP-64100 *(make offer)*
> * Avantek amplifier model AWP-42100 *(make offer)*
> * W1GHZ PCB Boards *(make offer)*
> o http://www.w1ghz.org/ <http://www.w1ghz.org/>
> * Lots of Qualcomm parts *(make offer)*
> o These appear to be commercial parts that are used to create your

> own 23cm transverter, among other gear.

> o The San Diego Microwave Group has articles and how-to's for
> this, http://www.ham-radio.com/sbms/sd/
> <http://www.ham-radio.com/sbms/sd/>
>
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[Casey AI7NN]

Update to items for sale, along with more info on the W1GHZ boards.

• Down East Microwave Inc. 3456-144LP Transverter ($80) SOLD
• Down East Microwave Inc. Low noise amplifier model 2303 PA ($40) SOLD
• 903mhz amplifier (unknown make and model) ($100) SOLD

• TOHTSU Coaxial Relay model CX-520D, new in box ($90)
• 19 element 23cm loop yagi ($100)
• 45 element 13cm loop yagi ($120)
• 10 element 33cm yagi ($75)
• 7 element 33cm yagi Kathrein-Scala TY-900 ($200)
• NEC Traveling Wave Tube LD-550A (make offer)
• Hamtronics receiving converter 222mhz (make offer)

• Avantek amplifier model AWP-64100 (make offer) SOLD

• Avantek amplifier model AWP-42100 (make offer)

• W1GHZ PCB Boards (make offer)

• • Four 2016/2017 era 2304/3456 boards.
    
  • Three 2008 era 720Mhz LO boards
    
  • Three 1296 transverters boards – (old Upside-down version - LO higher than the RF, can work with the relay boards).
    
  • Eight RF relay boards good to 3456.
    

• Lots of Qualcomm parts (make offer)
  • These appear to be commercial parts that are used to create your own 23cm transverter, among other gear.
  • The San Diego Microwave Group has articles and how-to's for this, http://www.ham-radio.com/sbms/sd/

[Casey AI7NN]

Update to items for sale. Added microwave bundle to the list.

• Microwave bundle ($600)
  • Down East Microwave Inc. 10368 - 144 Transverter
  • Two relays
  • 45cm dish with feed point
  • Some wave guide (The small tubing that is used instead of coax)

• TOHTSU Coaxial Relay model CX-520D, new in box ($90)
• 19 element 23cm loop yagi ($100)
• 45 element 13cm loop yagi ($120)
• 10 element 33cm yagi ($75)
• 7 element 33cm yagi Kathrein-Scala TY-900 ($200)
• NEC Traveling Wave Tube LD-550A (make offer)
• Hamtronics receiving converter 222mhz (make offer)

• Avantek amplifier model AWP-42100 (make offer)

• Lots of Qualcomm parts (make offer)
  • These appear to be commercial parts that are used to create your own 23cm transverter, among other gear.
  • The San Diego Microwave Group has articles and how-to's for this, http://www.ham-radio.com/sbms/sd/

• Down East Microwave Inc. 3456-144LP Transverter ($80) SOLD
• Down East Microwave Inc. Low noise amplifier model 2303 PA ($40) SOLD
• 903mhz amplifier (unknown make and model) ($100) SOLD

• Avantek amplifier model AWP-64100 (make offer) SOLD

• W1GHZ PCB Boards (make offer) SOLD

[Casey AI7NN]

Reduced prices on remaining items for sale.

• Microwave bundle ($500)

• • Down East Microwave Inc. 10368 - 144 Transverter
  • Two relays
  • 45cm dish with feed point
  • Some wave guide (The small tubing that is used instead of coax)

• TOHTSU Coaxial Relay model CX-520D, new in box ($75)
• 19 element 23cm loop yagi ($90)
• 45 element 13cm loop yagi ($100)
• 10 element 33cm yagi ($60)
• 7 element 33cm yagi Kathrein-Scala TY-900 ($150)

• NEC Traveling Wave Tube LD-550A (make offer)
• Hamtronics receiving converter 222mhz (make offer)

• Avantek amplifier model AWP-42100 (make offer)

• Lots of Qualcomm parts (make offer)
  • These appear to be commercial parts that are used to create your own 23cm transverter, among other gear.
  • The San Diego Microwave Group has articles and how-to's for this, http://www.ham-radio.com/sbms/sd/

• Down East Microwave Inc. 3456-144LP Transverter ($80) SOLD
• Down East Microwave Inc. Low noise amplifier model 2303 PA ($40) SOLD
• 903mhz amplifier (unknown make and model) ($100) SOLD

• Avantek amplifier model AWP-64100 (make offer) SOLD

• W1GHZ PCB Boards (make offer) SOLD

[Casey AI7NN]

Updated available items, added the following items, 70cm ATV unit, HP Microwave Power Meter Model 430C, HP Thermistor Mount Model 477B.

Reduced the price on the microwave bundle and have learned more about the transverter and added info about it.

• Microwave bundle ($300)

• • Down East Microwave Inc. 10368 - 144 Transverter

• • • 2m IF 1-10W in, 10 milliwatts out, 3.5nF, common IF, not locked.
      
  • Two 28V relays

• • 45cm dish with feed point

• • Some semi-rigid hardline (The small tubing that is used instead of coax)
• 70cm ATV unit ($50)
• HP Microwave Power Meter Model 430C ($50)
  
• HP Thermistor Mount Model 477B ($25)
  

• TOHTSU Coaxial Relay model CX-520D, new in box ($75)

• 45 element 13cm loop yagi ($100)
• 10 element 33cm yagi ($60)
• 7 element 33cm yagi Kathrein-Scala TY-900 ($150)
• NEC Traveling Wave Tube LD-550A (make offer)
• Hamtronics receiving converter 222mhz (make offer)
• Avantek amplifier model AWP-42100 (make offer)
• Lots of Qualcomm parts (make offer)
  • These appear to be commercial parts that are used to create your own 23cm transverter, among other gear.
  • The San Diego Microwave Group has articles and how-to's for this, http://www.ham-radio.com/sbms/sd/

• Down East Microwave Inc. 3456-144LP Transverter ($80) SOLD
• Down East Microwave Inc. Low noise amplifier model 2303 PA ($40) SOLD
• 903mhz amplifier (unknown make and model) ($100) SOLD
• Avantek amplifier model AWP-64100 (make offer) SOLD
• W1GHZ PCB Boards (make offer) SOLD

• 19 element 23cm loop yagi ($90) SOLD

[Casey AI7NN]

Updated available items. Microwave bundle is sold.

• 70cm ATV unit ($50)
• HP Microwave Power Meter Model 430C ($50)
  
• HP Thermistor Mount Model 477B ($25)
  

• TOHTSU Coaxial Relay model CX-520D, new in box ($75)

• 45 element 13cm loop yagi ($100)
• 10 element 33cm yagi ($60)
• 7 element 33cm yagi Kathrein-Scala TY-900 ($150)
• NEC Traveling Wave Tube LD-550A (make offer)
• Hamtronics receiving converter 222mhz (make offer)
• Avantek amplifier model AWP-42100 (make offer)
• Lots of Qualcomm parts (make offer)
  • These appear to be commercial parts that are used to create your own 23cm transverter, among other gear.
  • The San Diego Microwave Group has articles and how-to's for this, http://www.ham-radio.com/sbms/sd/

• Down East Microwave Inc. 3456-144LP Transverter ($80) SOLD
• Down East Microwave Inc. Low noise amplifier model 2303 PA ($40) SOLD
• 903mhz amplifier (unknown make and model) ($100) SOLD
• Avantek amplifier model AWP-64100 (make offer) SOLD
• W1GHZ PCB Boards (make offer) SOLD

• 19 element 23cm loop yagi ($90) SOLD

• Microwave bundle ($300) SOLD

• • Down East Microwave Inc. 10368 - 144 Transverter
    • 2m IF 1-10W in, 10 milliwatts out, 3.5nF, common IF, not locked.
    • Two 28V relays
    • 45cm dish with feed point
    • Some semi-rigid hardline (The small tubing that is used instead of coax)

[Casey AI7NN]

Update to list of items, new prices (some free with purchase) and items listed.

• 70cm ATV unit (unknown make and model) ($10)
• HP Microwave Power Meter Model 430C ($30)
  
  • HP Thermistor Mount Model 477B (FREE, if you buy the Power Meter)

• 10 element 33cm yagi (FREE, if you buy the below antenna)
  • 7 element 33cm yagi Kathrein-Scala TY-900 ($90)

• NEC Traveling Wave Tube LD-550A ($25)
• Hamtronics receiving converter 222mhz ($5)
  • (FREE) Will include another receiving converter, unknown make and model, nice metal box though.
• Lots of Qualcomm parts ($40)

• • These appear to be commercial parts that are used to create your own 23cm transverter, among other gear.
  • The San Diego Microwave Group has articles and how-to's for this, http://www.ham-radio.com/sbms/sd/

• • There do appear to be 10mhz reference oscillators on a couple of the boards if those could be repurposed.

• Avantek amplifier model AWP-42100 (make offer) SOLD
• TOHTSU Coaxial Relay model CX-520D, new in box ($75) SOLD
• 45 element 13cm loop yagi ($100) SOLD

• Down East Microwave Inc. 3456-144LP Transverter ($80) SOLD
• Down East Microwave Inc. Low noise amplifier model 2303 PA ($40) SOLD
• 903mhz amplifier (unknown make and model) ($100) SOLD
• Avantek amplifier model AWP-64100 (make offer) SOLD
• W1GHZ PCB Boards (make offer) SOLD

• 19 element 23cm loop yagi ($90) SOLD

• Microwave bundle ($300) SOLD

• • Down East Microwave Inc. 10368 - 144 Transverter
    • 2m IF 1-10W in, 10 milliwatts out, 3.5nF, common IF, not locked.
    • Two 28V relays
    • 45cm dish with feed point
    • Some semi-rigid hardline (The small tubing that is used instead of coax)