Kit #1: Dynaco clone PC5 & PC6

This is our basic clone kit. The circuit and PCB layout are almost identical to the original Dynaco PC5 and PC6, but we have made some slight changes to the RIAA component values on the PC6 phono preamp to make it a b it more compatible with modern MM cartridges. Both preamps use two 12AX7 triodes each.
Other than that, both the PC5 and PC6 are a direct drop in with all of the same connections as the original Dynaco PC5 and PC6.

Quality metal film resistors, film capacitors and ceramic tube sockets are standard with this kit. The PCBs are manufactured to FR4-TG standards with ground planes on both sides to improve screening as well as component screen printing to make assembly easier.

A set of assembly instructions are also included, however tubes are not included. They are available to be purchased separately; please see the relevant link above. Please also note that the photos are a general indication, and component colors and style can and will vary.

An important note about using the clone kits - if you are going to combine these clone kits containing modern and new components with your older, original PAS2/3 parts, you may experience some unexpected sound issues that were not present with your original PC5 and PC6. Since you are introducing brand new, high-tolerance components with parts that are 40+ years old that may have shifted from their original value/s - this is especially true with capacitors - this mismatch could have undesirable consequences.

Kit & Instructions: $69.50 & shipping $8.50 to lower 48 only!

Kit #2: Z-PC5 & Z-PC6 Phono & Line Preamps

This is the next step up from the original Dynaco circuits. Both the Z-PC6 phono and Z-PC5 line preamps offer vastly improved circuits and performances over the original Dynaco designs, with far superior sound reproduction. The phono preamp Z-PC6 as well as the line preamp Z-PC5 use 2x 12AX7's each. Quality metal film resistors, film capacitors and ceramic tube sockets are standard with this kit. The PCB's are manufactured to FR4-TG standards with ground planes on both sides to improve screening as well as component screen printing to make assembly easier.
NOTE: the tubes require a 24VDC supply for the filaments, not 6.3V or 12.6VDC!
A set of assembly instructions is also included. However tubes are not included but can be purchased from us. Please see the relevant link above. Please note that the photos are a general indication, and component colors and style can and will vary.

An important note about using the Z-PC5 & Z-PC6 kits: you will lose the functionality of ALL tone controls, the original selector switch (a new standard single wafer 2 pole 6 position switch needs to be used, click here), blend, filter and loudness functions. The Z-PC5 is a classic line preamp circuit without any of the above functions.
The Z-series will also work with most solid state amps, but, there will always be exceptions and we cannot advise which soild state amps may require an impedance matching circuit, as there are just too many variables.
The output impedance of our Z-PC5 line preamp is around 70K and operates best into a high input impedance load.

If you want to retain tone controls using a modern tube circuit, you will need to consider our TCLA tone control kit, Kit#4 below.

Kit #3: Z-PH10 Phono Preamp

This is our ultimate phono preamp for your PAS upgrade. Sonically superior to all other phono preamps we offer, this kit will frankly shame a lot of so-called high end phono preamps currently on the market. It is a hybrid design using a JFET at the critical input stage to ensure super low noise operation. It also has its very own onboard B+ regulator to ensure optimal performace. This phono preamp uses two 12AY7 triodes. The PCB is manufactured to FR4-TG standards with ground planes on both sides to improve screening as well as component screen printing to make assembly easier.
IMPORTANT NOTE: We DO NOT RECOMMEND that the original PA211 power transformer be used for the Z-PH10 due to the higher current demand of the Z-PH10 circuit. Instead, we recommend that you use one of our regulated power supply upgrades, click here.
NOTE: the tubes require a 24VDC supply for the filaments, not 6.3V or 12.6VDC!
A set of assembly instructions are also included, however, tubes are not included, but can be purchased from us, please see the relevant link above. Please note, that the photos are a general indication, and component colors and style can and will vary.


Kit #4: TCLA Tone Control Preamp

This tone control preamp uses the excellent and proven Baxandall tone control circuit still widely in use today with tube and solid state tone control preamps. The tone control circuit is designed in such a way that with the controls centered, there is zero influence on the signal. See the graphs below for details. This tone control preamp uses four 12AX7 triodes. The PCB is manufactured to FR4-TG standards with ground planes on both sides to improve screening as well as component screen printing to make assembly easier.
The TCLA will also work with most solid state amps, but, there will always be exceptions and we cannot advise which soild state amps may require an impedance matching circuit, as there are just too many variables.
Effective output impedance for the TCLA is 1K.
NOTE: the tubes require a 24VDC supply for the filaments, not 6.3V or 12.6VDC!
A set of assembly instructions is also included. However, tubes are not included but can be purchased from us. Please see the relevant link above. Please note that the photos are a general indication, and component colors and style can and will vary.

The potentiometers used in this kit are only suitable for 'set screw' style knobs, the old push on knobs will not work!

An important note regarding the TCLA:  since this preamp uses four tubes, the original Dynaco PA211 power transformer will not be able to handle the additional filament current demanded by the two additional tubes. You will need to use one of our regulated power supply kits, details of which can be found on our power supply kits page.


Kit #5: AIKIDO Classic Line Preamp

This is our classic line preamp (with no tone controls) based on the Aikido topology and recently revised. It is a very sweet sounding preamp with a perfect balance of treble and bass, neither one overpowering the other. This is the preamp you want to use if you do not wish to have tone controls.

The Aikido uses four 12AX7 triodes. The pcb is manufactured to FR4-TG standards with ground planes on both sides to improve screening as well as component screen printing to make assembly easier. A set of assembly instructions is also included. However, tubes are not included, but can be purchased from us. Please see the relevant link above.
The Aikido will also work with most solid state amps, but, there will always be exceptions and we cannot advise which soild state amps may require an impedance matching circuit, as there are just too many variables.
Effective output impedance for our Aikido with is 180 OHMS.
NOTE: the tubes require a 24VDC supply for the filaments, not 6.3V or 12.6VDC!

Please note that the photos are a general indication, and component colors and style can and will vary.

An important rnote egarding the AIKIDO:  since this preamp uses four tubes, the original Dynaco PA211 power transformer will not be able to handle the additional filament current demanded by the two additional tubes. You will need to use one of our regulated power supply kits, details of which can be found on our power supply kits page.


Please note:  for multiple items ordered, shipping fees will add up. However we will refund excess shipping to you as soon as we have received your order.
For all international and overseas shipping, please see below
Additional shipping & handling to all remaining
US states & territories for these kits: +$8.00



Additional shipping & handling to Canada for these kits: +$14.00



The United State post office has discontinued a type of shipping to Europe, Asia and the South Pacific we used all the time. So now we use a variety of international couriers, this requires us to obtain a quote up front.
Please contact us for shipping cost to your region, thank you.





PAS Preamp Upgrade Kits

Please note: ALL our kits require assembly!
Also, all the resistors and capacitors are mixed together, they are not packed in their individual values and/or types.
supplied kits are NOT assembled!
Kit & Instructions: $79.50 & shipping $8.50 to lower 48 only!
For all international and overseas shipping, please see below
supplied kit is NOT assembled! Tubes are 12AY7 and sold separately!
Kit & Instructions: $62.50 & shipping $8.50 to lower 48 only!
For all international and overseas shipping, please see below
supplied kit is NOT assembled! Tubes are 12AX7 and sold separately
Kit & Instructions: $88.50 & shipping $8.50 to lower 48 only!
For all international and overseas shipping, please see below
Kit & Instructions: $72.50 & shipping $8.50 to lower 48 only!
For all international and overseas shipping, please see below
supplied kit is NOT assembled! Tubes  are 12AX7 and sold separately!


Kit #35: Center Channel/MONO Preamp

This kit was designed as part of our new PAS-NGTC/NGC preamp kits which have the blend and mono controls.
It can however be used as a 'stand alone' center/mono channel preamp, for those who wish to add this mod to their PAS preamp.
It uses a single 12DW7 tube, which is a unique tube in that one section/triode is of 12AX7 specs and the other is of a 12AU7 spec, and this is a perfect fit for this circuit! Note, the 12DW7 tube is NOT included with this kit!
This mono preamp has been designed to be used with our regulated power supply kits. A standard Dynaco power supply using the PA211 power transformer will not work to power this additional tube.
The pcb has been designed to fit in existing holes around where the old can style multi capacitor was installed. The holes will match the holes around that area.
This mono preamp gets it inputs from the line preamp outputs, usually our TCLA tone control preamp or our Aikido classic line preamp and should be installed with its own 100K single gang volume control at the input, so that the center channel speaker can be independently controlled as well as being controlled by the main PAS volume control.
See our kit#36, Blend Function and Center Volume Controls for the colme control for this center channel preamp.
This is a preamp, not a power amp, so the center speaker must either be powered by its own built in amp or the power amp must have a center speaker ouput!

Kit & Instructions: $35.00 & shipping $8.50 to lower 48 only!
For all international and overseas shipping, please see below
supplied kit is NOT assembled! Tube is 12AX7 and sold separately!


supplied kits are NOT assembled! Tubes are 12AX7 and sold separately!
Please note:  with the exception of our clone kit#1, with all other kits, the volume control should be 100K and the balance control should be 250K
We have a minimum order value, this is $20.00. Please ensure that your total order value meets or exceeds $20.00, thank you. Orders of less than $20.00 will be refunded.